WO2004078733A1 - Quinazolines useful as modulators of ion channels - Google Patents

Quinazolines useful as modulators of ion channels Download PDF

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Publication number
WO2004078733A1
WO2004078733A1 PCT/US2004/006451 US2004006451W WO2004078733A1 WO 2004078733 A1 WO2004078733 A1 WO 2004078733A1 US 2004006451 W US2004006451 W US 2004006451W WO 2004078733 A1 WO2004078733 A1 WO 2004078733A1
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och
optionally substituted
ring
compound
phenyl
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PCT/US2004/006451
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English (en)
French (fr)
Inventor
Jesus E. Gonzales, Iii
Dean Mitchell Wilson
Andreas Peter Termin
Peter Diederik Jan Grootenhuis
Yulian Zhang
Benjamin John Petzoldt
Lev Tyler Dewey Fanning
Timothy Donald Neubert
Roger D. Tung
Esther Martinborough
Nicole Zimmermann
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Vertex Pharmaceuticals Inc
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Vertex Pharmaceuticals Inc
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Priority to BR0408026-2A priority Critical patent/BRPI0408026A/pt
Priority to CN200480011981.4A priority patent/CN1784391B/zh
Priority to AT04716887T priority patent/ATE453629T1/de
Priority to NZ542664A priority patent/NZ542664A/en
Priority to HK06108587.6A priority patent/HK1088314B/xx
Priority to CA002517844A priority patent/CA2517844A1/en
Priority to DE602004024873T priority patent/DE602004024873D1/de
Priority to JP2006509028A priority patent/JP5247027B2/ja
Application filed by Vertex Pharmaceuticals Inc filed Critical Vertex Pharmaceuticals Inc
Priority to AU2004217891A priority patent/AU2004217891B2/en
Priority to EP04716887A priority patent/EP1608632B1/en
Publication of WO2004078733A1 publication Critical patent/WO2004078733A1/en
Anticipated expiration legal-status Critical
Priority to IL170636A priority patent/IL170636A/en
Priority to NO20054546A priority patent/NO20054546L/no
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Definitions

  • the present invention relates to compounds useful as inhibitors of ion channels.
  • the invention also provides pharmaceutically acceptable compositions comprising the compounds of the invention and methods of using the compositions in the treatment of various disorders.
  • Na channels are central to the generation of action potentials in all excitable cells such as neurons and myocytes. They play key roles in excitable tissue including brain, smooth muscles of the gastrointestinal tract, skeletal muscle, the peripheral nervous system, spinal cord and airway. As such they play key roles in a variety of disease states such as epilepsy (See. Moulard, B. and D. Bertrand (2002) "Epilepsy and sodium channel blockers” Expert Opin. Ther. Patents 12(1): 85-91)), pain (See, Waxman, S. G., S. Dib-Hajj, et al.
  • Voltage gated Na channels comprise a gene family consisting of 9 different subtypes (NaVl.l-NaV1.9). As shown in Table 1, these subtypes show tissue specific localization and functional differences (See, Goldin, A. L. (2001) "Resurgence of sodium channel research” Annu Rev Physiol 63: 871-94). Three members of the gene family (NaV1.8, 1.9, 1.5) are resistant to block by the well-known Na channel blocker TTX, demonstrating subtype specificity within this gene family. Mutational analysis has identified glutamate 387 as a critical residue for TTX binding (See, Noda, M., H. Suzuki, et al. (1989) "A single point mutation confers tetrodotoxin and saxitoxin insensitivity on the sodium channel IT FEBS Lett 259(1): 213-6).
  • CNS central nervous system
  • PNS peripheral nervous sytem
  • DRG dorsal root ganglion
  • TG Trigeminal ganglion
  • NaVs voltage-gated sodium channels
  • Antagonists of NaV channels can attenuate these pain signals and are useful for treating a variety of pain conditions, including but not limited to acute, chronic, inflammatory, and neuropathic pain.
  • Known NaV antagonists such as TTX, lidocaine (See, Mao, J. and L. L. Chen (2000) "Systemic lidocaine for neuropathic pain relief Pain 87(1): 7-17.) bupivacaine, phenytoin (See, Jensen, T. S.
  • Hyperalgesia extreme sensitivity to something painful
  • tissue injury or inflammation reflects, at least in part, an increase in the excitability of high-threshold primary afferent neurons innervating the site of injury.
  • Voltage sensitive sodium channels activation is critical for the generation and propagation of neuronal action potentials.
  • modulation of NaV currents is an endogenous mechanism used to control neuronal excitability (See, Goldin, A. L. (2001) "Resurgence of sodium channel research" Annu Rev Physiol 63: 871-94.).
  • TTX-resistant currents are insensitive to micromolar concentrations of tetrodotoxin, and displays slow activation and inactivation kinetics and a more depolarized activation threshold when compared to other voltage-gated sodium channels.
  • TTX-resistant sodium currents are primarily restricted to a subpopulation of sensory neurons likely to be involved in nociception. Specifically, TTX-resistant sodium currents are expressed almost exclusively in neurons that have a small cell-body diameter; and give rise to small-diameter slow-conducting axons and that are responsive to capsaicin.
  • a large body of experimental evidence demonstrates that TTX-resistant sodium channels are expressed on C-fibers and are important in the transmission of nociceptive information to the spinal cord.
  • NaVl.8 protein is upregulated along uninjured C-fibers adjacent to the nerve injury.
  • Antisense treatment prevents the redistribution of NaVl.8 along the nerve and reverses neuropathic pain.
  • expression of NaV1.8 and NaV1.9 are greatly reduced whereas expression of the TTX sensitive subunit NaV1.3 is 5-10 fold upregulated (See, Dib-Hajj, S. D., J. Fjell, et al. (1999) "Plasticity of sodium channel expression in DRG neurons in the chronic constriction injury model of neuropathic pain.” Pain 83(3): 591-600.)
  • the timecourse of the increase in NaV1.3 parallels the appearance of allodynia in animal models subsequent to nerve injury.
  • the biophysics of the NaV1.3 channel is distinctive in that it shows very fast repriming after inactivation following an action potential.
  • NaV1.3 is expressed in the central and peripheral systems of man.
  • NaV1.9 is similar to NaV1.8 as it is selectively localized to small sensory neurons of the dorsal root ganglion and trigeminal ganglion (See, Fang, X., L. Djouhri, et al. (2002).
  • the resting membrane potential of NaV1.9 expressing cells is in the -55 to -50mV range compared to - 65mV for most other peripheral and central neurons.
  • This persistent depolarization is in large part due to the sustained low-level activation of NaV1.9 channels.
  • This depolarization allows the neurons to more easily reach the threshold for firing action potentials in response to nociceptive stimuli.
  • Compounds that block the NaV 1.9 channel may play an important role in establishing the set point for detection of painful stimuli. In chronic pain states, nerve and nerve ending can become swollen and hypersensitive exhibiting high frequency action potential firing with mild or even no stimulation.
  • NaV 1.8 and NaV 1.7 are also expressed in dorsal root ganglion neurons and contribute to the small TTX sensitive component seen in these cells. NaV 1.7 in particular my therefore be a potential pain target in addition to it's role in neuroendocrine excitability (See, Klugbauer, N., L. Lacinova, et al.
  • NaVl.l See. Sugawara, T., E. Mazaki-Miyazaki, et al. (2001) "Navl.l mutations cause febrile seizures associated with afebrile partial seizures.” Neurology 57(4): 703-5.
  • NaV1.2 See, Sugawara, T., Y. Tsurubuchi, et al.
  • Antagonists for NaV1.5 have been developed and used to treat cardiac arrhythmias.
  • a gene defect in NaVl.5 that produces a larger noninactivating component to the current has been linked to long QT in man and the orally available local anesthetic mexilitine has been used to treat this condition (See, Wang, D. W., K. Yazawa, et al. (1997) "Pharmacological targeting of long QT mutant sodium channels.” J Clin Invest 99(7): 1714- 20).
  • Na channel blockers are currently used or being tested in the clinic to treat epilepsy (See, Moulard, B. and D. Bertrand (2002) “Epilepsy and sodium channel blockers” Expert Opin. Ther. Patents 12(1): 85-91.); acute (See, Wiffen, P., S. Collins, et al. (2000) “Anticonvulsant drugs for acute and chronic pain” Cochrane Database Syst Rev 3), chronic (See, Wiffen, P., S. Collins, et al. (2000) "Anticonvulsant drugs for acute and chronic pain” Cochrane Database Syst Rev 3, and Guay, D. R.
  • Calcium channels are membrane-spanning, multi-subunit proteins that allow Ca entry from the external milieu and concurrent depolarization of the cell's membrane potential. Traditionally calcium channels have been classified based on their functional characteristics such as low voltage or high voltage activated and their kinetics (L,T,N,P,Q).
  • the ability to clone and express the calcium channel subunits has lead to an increased understanding of the channel composition that produces these functional responses.
  • the ⁇ l is the subunit containing the channel pore and voltage sensor, ce2 is primarily extracellular and is disulfide linked to the transmembrane ⁇ subunit, ⁇ is nonglycosylated subunit found bound to the cytoplasmic region of the ⁇ l subunit of the Ca channel.
  • ce2 is primarily extracellular and is disulfide linked to the transmembrane ⁇ subunit
  • ⁇ is nonglycosylated subunit found bound to the cytoplasmic region of the ⁇ l subunit of the Ca channel.
  • the various calcium channel subtypes are believed to made up of the following specific subunits:
  • N-Type comprising subunits ⁇ , oc2 ⁇ , ⁇ * o P-Type, comprising subunits O JA , ⁇ 2 ⁇ , ⁇ a
  • Q-Type comprising subunits O JA (splice variant) ⁇ 2 ⁇ , ⁇ 4a
  • R-Type comprising subunits OC_ E , ⁇ 2 ⁇ , ⁇ _ b
  • T-Type comprising subunits ⁇ _o, am, or c
  • the N type Ca channel (CaV2.2) is highly expressed at the presynaptic nerve terminals of the dorsal root ganglion as it forms a synapse with the dorsal horn neurons in lamina I and II. These neurons in turn have large numbers of N type Ca channels at their presynaptic terminals as they synapse onto second and third order neurons. This pathway is very important in relaying pain information to the brain.
  • Acute pain serves an important protective function in keeping the organism safe from stimuli that may produce tissue damage. Severe thermal, mechanical, or chemical inputs have the potential to cause severe damage to the organism if unheeded.
  • Acute pain serves to quickly remove the individual from the damaging environment. Acute pain by its very nature generally is short lasting and intense. Inflammatory pain on the other had may last for much longer periods of time and it's intensity is more graded. Inflammation may occur for many reasons including tissue damage, autoimmune response, and pathogen invasion.
  • Inflammatory pain is mediated by an "inflammatory soup” that consists of substance P, histamines, acid, prostaglandin, bradykinin, CGRP, cytokines, ATP, and neurotransmitter release.
  • the third class of pain is neuropathic and involves nerve damage that results in reorganization of neuronal proteins and circuits yielding a pathologic "sensitized” state that can produce chronic pain lasting for years. This type of pain provides no adaptive benefit and is particularly difficult to treat with existing therapies.
  • Pain, particularly neuropathic and intractable pain is a large unmet medical need. Millions of individuals suffer from severe pain that is not well controlled by current therapeutics.
  • the current drugs used to treat pain include NSAIDS, COX2 inhibitors, opioids, tricyclic antidepressants, and anticonvulsants.
  • Neuropathic pain has been particularly difficult to treat as it does not respond well to opiods until high doses are reached.
  • Gabapentin is currently the favored therapeutic for the treatment of neuropathic pain although it works in only 60% of patients where it shows modest efficacy. The drug is however very safe and side effects are generally tolerable although sedation is an issue at higher doses.
  • the N type Ca channel has been validated in man by intrathecal infusion of the toxin Ziconotide for the treatment of intractable pain, cancer pain, opioid resistant pain, and neuropathic and severe pain.
  • the toxin has an 85% success rate for the treatment of pain in humans with a greater potency than morphine.
  • An orally available N type Ca channel antagonist would garner a much larger share of the pain market.
  • Ziconotide causes mast cell degranulation and produces dose-dependent central side effects. These include dizziness, nystagmus, agitation, and dysmetria. There is also orthostatic hypotension in some patients at high doses. The primary risk for this target involves the CNS side effects seen with Ziconotide at high dosing.
  • These compounds and pharmaceutically acceptable compositions are useful for treating or lessening the severity of a variety of diseases, disorders, or conditions, including, but not limited to, acute, chronic, neuropathic, or inflammatory pain, arthritis, migrane, cluster headaches, trigeminal neuralgia, herpetic neuralgia, general neuralgias, epilepsy or epilepsy conditions, neurodegenerative disorders, psychiatric disorders such as anxiety and depression, myotonia, arrythmia, movement disorders, neuroendocrine disorders, ataxia, multiple sclerosis, irritable bowel syndrome, incontinence, visceral pain, osteoarthritis pain, postherpetic neuralgia, diabetic neuropathy, radicular pain, sciatica, back pain, head or neck pain, severe or intractable pain, nociceptive pain, breakthrough pain, postsurgical pain, or cancer pain.
  • diseases, disorders, or conditions including, but not limited to, acute, chronic, neuropathic, or inflammatory pain, arthritis, migrane,
  • the present invention relates to compounds of formula I useful as inhibitors of voltage-gated sodium channels and calcium channels:
  • X is O or NR 2 ; wherein R 1 and R 2 are each independently an optionally substituted group selected from hydrogen, C t -ealiphatic, or Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated, or partially unsaturated monocyclic or bicyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C_.
  • R 4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, - SO 2 NR-, or -NRSO 2 -; or R 1 and R 2 , taken together with the nitrogen atom to which they are bound, form an optionally substituted 3-12-membered monocyclic or bicyclic saturated, partially unsaturated, or fully unsaturated ring having 0-3 additional heteroatoms independently selected from nitrogen, sulfur, or oxygen; wherein R and R , or the ring formed by R 1 and R 2 taken together, are each optionally and independently substituted at one or more substitutable carbon, nitrogen, or sulfur atoms with z independent occurrences of - R 4 , wherein z is 0-5; Ring A is a 5-7-membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or
  • compounds of the invention may optionally be substituted with one or more substituents, such as are illustrated generally above, or as exemplified by particular classes, subclasses, and species of the invention. It will be appreciated that the phrase “optionally substituted” is used interchangeably with the phrase “substituted or unsubstituted.” In general, the term “substituted”, whether preceded by the term “optionally” or not, refers to the replacement of hydrogen radicals in a given structure with the radical of a specified substituent.
  • an optionally substituted group may have a substituent at each substitutable position of the group, and when more than one position in any given structure may be substituted with more than one substituent selected from a specified group, the substituent may be either the same or different at every position.
  • Combinations of substituents envisioned by this invention are preferably those that result in the formation of stable or chemically feasible compounds.
  • stable refers to compounds that are not substantially altered when subjected to conditions to allow for their production, detection, and preferably their recovery, purification, and use for one or more of the purposes disclosed herein.
  • a stable compound or chemically feasible compound is one that is not substantially altered when kept at a temperature of 40°C or less, in the absence of moisture or other chemically reactive conditions, for at least a week.
  • aliphatic or "aliphatic group”, as used herein, means a straight-chain (i.e., unbranched) or branched, substituted or unsubstituted hydrocarbon chain that is completely saturated or that contains one or more units of unsaturation, or a monocyclic hydrocarbon or bicyclic hydrocarbon that is completely saturated or that contains one or more units of unsaturation, but which is not aromatic (also referred to herein as “carbocycle” "cycloaliphatic” or “cycloalkyl”), that has a single point of attachment to the rest of the molecule.
  • aliphatic groups contain 1-20 aliphatic carbon atoms.
  • aliphatic groups contain 1-10 aliphatic carbon atoms. In other embodiments, aliphatic groups contain 1-8 aliphatic carbon atoms. In still other embodiments, aliphatic groups contain 1-6 aliphatic carbon atoms, and in yet other embodiments aliphatic groups contain 1-4 aliphatic carbon atoms.
  • cycloaliphatic refers to a monocyclic C 3 -C 8 hydrocarbon or bicyclic C 8 -C 12 hydrocarbon that is completely saturated or that contains one or more units of unsaturation, but which is not aromatic, that has a single point of attachment to the rest of the molecule wherein any individual ring in said bicyclic ring system has 3-7 members.
  • Suitable aliphatic groups include, but are not limited to, linear or branched, substituted or unsubstituted alkyl, alkenyl, alkynyl groups and hybrids thereof such as (cycloalkyl)alkyl, (cycloalkenyl)alkyl or (cycloalkyl)alkenyl.
  • heteroaliphatic means aliphatic groups wherein one or two carbon atoms are independently replaced by one or more of oxygen, sulfur, nitrogen, phosphorus, or silicon. Heteroaliphatic groups may be substituted or unsubstituted, branched or unbranched, cyclic or acyclic, and include "heterocycle”, “heterocyclyl”, “heterocycloaliphatic”, or “heterocyclic” groups.
  • heterocycle means non-aromatic, monocyclic, bicyclic, or tricyclic ring systems in which one or more ring members are an independently selected heteroatom.
  • the "heterocycle”, “heterocyclyl”, “heterocycloaliphatic”, or “heterocyclic” group has three to fourteen ring members in which one or more ring members is a heteroatom independently selected from oxygen, sulfur, nitrogen, or phosphorus, and each ring in the system contains 3 to 7 ring members.
  • heteroatom means one or more of oxygen, sulfur, nitrogen, phosphorus, or silicon (including, any oxidized form of nitrogen, sulfur, phosphorus, or silicon; the quaternized form of any basic nitrogen or; a substitutable nitrogen of a heterocyclic ring, for example N (as in 3,4-dihydro-2H-pyrrolyl), NH (as in pyrrolidinyl) or NR + (as in N-substituted pyrrolidinyl)).
  • alkoxy refers to an alkyl group, as previously defined, attached to the principal carbon chain through an oxygen (“alkoxy”) or sulfur (“thioalkyl”) atom.
  • haloalkyl means alkyl, alkenyl or alkoxy, as the case may be, substituted with one or more halogen atoms.
  • halogen means F, Cl, Br, or I.
  • aryl used alone or as part of a larger moiety as in “aralkyl”, “aralkoxy”, or “aryloxyalkyl”, refers to monocyclic, bicyclic, and tricyclic ring systems having a total of five to fourteen ring members, wherein at least one ring in the system is aromatic and wherein each ring in the system contains 3 to 7 ring members.
  • aryl may be used interchangeably with the term “aryl ring”.
  • aryl also refers to heteroaryl ring systems as defined hereinbelow.
  • heteroaryl used alone or as part of a larger moiety as in “heteroaralkyl” or “heteroarylalkoxy”, refers to monocyclic, bicyclic, and tricyclic ring systems having a total of five to fourteen ring members, wherein at least one ring in the system is aromatic, at least one ring in the system contains one or more heteroatoms, and wherein each ring in the system contains 3 to 7 ring members.
  • heteroaryl may be used interchangeably with the term “heteroaryl ring” or the term “heteroaromatic”.
  • An aryl (including aralkyl, aralkoxy, aryloxyalkyl and the like) or heteroaryl (including heteroaralkyl and heteroarylalkoxy and the like) group may contain one or more substituents and thus may be "optionally substituted".
  • Optional substituents on the aliphatic group of R° are selected from NH 2 , NH(C 1-4 aliphatic), N(C 1- aliphatic) 2 , halogen, C 1- aliphatic, OH, O(C 1-4 aliphatic), NO 2 , CN, CO 2 H, CO 2 (C ⁇ ⁇ aliphatic), O(haloC 1-4 aliphatic), or haloC 1- aliphatic, wherein each of the foregoing C 1- aliphatic groups of R° is unsubstituted.
  • An aliphatic or heteroaliphatic group, or a non-aromatic heterocyclic ring may contain one or more substituents and thus may be "optionally substituted".
  • R + is hydrogen, an optionally substituted
  • Optional substituents on the aliphatic group or the phenyl ring of R + are selected from -NH 2 , -NH(C 1-4 aliphatic), -N(C 1-4 aliphatic) 2 , halogen, C 1- aliphatic, -OH, -O(C 1-4 aliphatic), -NO 2 , -CN, -CO 2 H, -CO 2 (C 1-4 aliphatic), -O(halo C 1-4 aliphatic), or halo(C 1-4 aliphatic), wherein each of the foregoing C 1- aliphatic groups of R + is unsubstituted.
  • alkylidene chain refers to a straight or branched carbon chain that may be fully saturated or have one or more units of unsaturation and has two points of attachment to the rest of the molecule.
  • two independent occurrences of R° are taken together with the atom(s) to which they are bound to form an optionally substituted 3-12 membered saturated, partially unsaturated, or fully unsaturated monocyclic or bicyclic ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, or sulfur.
  • Exemplary rings that are formed when two independent occurrences of R° (or R + , R, R' or any other variable similarly defined herein), are taken together with the atom(s) to which each variable is bound include, but are not limited to the following: a) two independent occurrences of R° (or R + , R, R' or any other variable similarly defined herein) that are bound to the same atom and are taken together with that atom to form a ring, for example, N(R°) , where both occurrences of R° are taken together with the nitrogen atom to form a piperidin-1-yl, piperazin-1-yl, or morpholin-4-yl group; and b) two independent occurrences of R° (or R + , R, R' or any other variable similarly defined herein) that are bound to different atoms and are taken together with both of those atoms to form a ring, for example
  • a fused 6-membered oxygen containing ring u .
  • R° or R + , R, R' or any other variable similarly defined herein
  • structures depicted herein are also meant to include all isomeric (e.g., enantiomeric, diastereomeric, and geometric (or conformational)) forms of the structure; for example, the R and S configurations for each asymmetric center, (Z) and (E) double bond isomers, and (Z) and (E) conformational isomers.
  • X is O or NR . Accordingly, in certain embodiments, X is NR , and compounds have the structure of formula I- A:
  • X is O
  • compounds have the structure of formula I-B:
  • one of R 1 or R 2 is hydrogen, and the other of R 1 and R 2 is selected from an optionally substituted C 1- aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -, or is Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12- membered saturated, or partially unsaturated monocyclic or bicyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1- aliphatic group, wherein one or more methylene units in the
  • R 1 and R 2 are each independently selected from Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12- membered saturated, or partially unsaturated monocyclic or bicyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C ⁇ - aliphatic group, wherein one or more methylene units in the C 1- aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or from an optionally substituted C 1- aliphatic group, wherein one or more methylene units in the C_.
  • R or R is an optionally substituted C 1- aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O- , -COO-, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -.
  • the optionally substituted C 1- aliphatic group is substituted with Cy , wherein Cy is 5-7- membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12 membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is optionally substituted with 0-5 independent occurrences of -R 5 .
  • one of R 1 or R 2 is hydrogen or C 1 -C 4 alkyl, and the other of R 1 or R 2 is -CH ⁇ Cy 1 .
  • R 1 is an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO-, -OCO, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -.
  • R 1 nor R 2 are each independently selected from Cy 1 , wherein Cy 1 is a 5-7- membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated, or partially unsaturated monocyclic or bicyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1- aliphatic group are optionally replaced with -NR-, -O- , -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or from an optionally substituted C 1-
  • both R 1 and R 2 are an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with - NR-, -O-, -COO-, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 ..
  • Cy 1 is selected from:
  • exemplary R 1 and R 2 groups are optionally substituted methyl, ethyl, cyclopropyl, n-propyl, propenyl, cyclobutyl, (CO)OCH 2 CH 3 , (CH 2 ) 2 OCH 3 , CH 2 (CO)OCH 2 CH 3 , CH 2 (CO)OCH 3 ,
  • R and R groups include those shown below in Table 2.
  • R and R taken together with the nitrogen atom to which they are bound, form an optionally substituted 3-12 membered heterocyclyl ring having 1-3 heteroatoms independently selected from nitrogen, sulfur, or oxygen.
  • R 1 and R 2 are taken together with the nitrogen atom to which they are bound and form a group selected from:
  • R 1 and R 2 taken together are optionally substituted azetidin-1-yl (jj), pyrrolidin-1-yl (ff), piperidinl-yl (dd), piperazin- 1-yl (cc), or morpholin-4-yl (ee).
  • R 1 and R 2 taken together are optionally substituted azetidin-1-yl (jj), pyrrolidin-1-yl (ff), piperidinl-yl (dd), or piperazin-1-yl (cc).
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj). In yet other embodiments, for compounds of formula I-A, R 1 and R 2 , taken together is optionally substituted pyrrolidin-1-yl (ff). In still other embodiments, for compounds of formula I-A, R 1 and R 2 , taken together is optionally substituted piperidinl-yl (dd). In yet other embodiments, for compounds of formula I-A, R 1 and R 2 , taken together is optionally substituted piperazin- l-yl (cc).
  • z is 0-2. In other embodiments, z is 0 and the ring is unsubstituted.
  • Preferred R 4 groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', -COOR', -NRCOR', -CON(R') 2 , - OCON(R') 2 , COR', -NHCOOR', -SO 2 R ⁇ -SO 2 N(R') 2 , or an optionally substituted group selected from .Cealiphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, aryl - C 6 alkyl, heteroarylC C ⁇ alkyl, cycloaliphaticCi-C ⁇ alkyl, or heterocycloaliphatic -
  • R 4 groups are Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, -COOH, -N(CH 3 ) 2 , - N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, -NHCOCH 3 , - SO 2 NH 2 , -SO 2 (CH 2 ) 3 CH 3 , -SO 2 CH(CH 3 ) 2 , -SO 2 N(CH 3 ) 2 , -SO 2 CH 2 CH 3 , - C(O)OCH 2 CH(CH 3 ) 2 , -C(O)NHCH 2 CH(CH 3 ) 2 , -NHCOOCH 3 , -C(O)C(CH 3 ) 3 , - COO(CH 2 ) 2 CH 3 , -C(C(
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 or 2 and at least one occurrence of R 4 is -NRSO 2 R', -NRCOOR', or -NRCOR'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRS0 R'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is - NRCOOR'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRCOR'.
  • R 1 and R 2 taken together is optionally substituted pyrrolidin-1-yl (ff), wherein z is 1 or 2 and R 4 is Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , - OR', or -CH 2 OR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 or 2 and at least one occurrence of R 4 is Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR', -NRSO 2 R', - NRCOOR', or -OCON(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR'.
  • dd piperidin-1-yl
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 or 2 and at least one occurrence of R 4 is -SOR', -CON(R') 2 , -SO 2 N(R') 2 , -COR', or -COOR'.
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -SOR'.
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -COOR'.
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -CON(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -SO 2 N(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -COR'.
  • the quinazoline ring can be substituted with up to four independent occurrences of R 3 .
  • x is 0-2.
  • x is 1 or 2.
  • x is 1 and R is substituted at the 6- or 7-position of the quinazoline ring.
  • R 3 groups are halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', - CH 2 OR', -SR', -CH 2 SR', -COOR', -NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', - NHCOOR', -SO 2 R', -SO 2 N(R') , or an optionally substituted group selected from C_.
  • each occurrence of R 3 is independently Cl, Br, F, CF , -OCF 3 , Me, Et, CN, -COOH, -NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -OCH 3 , -OCH 2 CH 3 , -CH 2 OH, -NHCOCH 3 , -NHCOCH(CH 3 ) 2 , -SO 2 NH 2 , - CONH(cyclopropyl), -CONHCH 3 , -CONHCH 2 CH 3 , or an optionally substituted group selected from -piperidinyl, piperizinyl, morpholino, phenyl, phenyloxy, benzyl, or benzyloxy.
  • x is 1 or 2 and each R 3 group is independently halogen, CN, optionally substituted C ⁇ Cealkyl, OR', N(R') 2 , CON(R') 2 , or NRCOR'.
  • x is 1 or 2 and each R 3 group is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , - CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, - CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), - OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 7- position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , - CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , - CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'. In yet other embodiments, x is 1 and R 3 is at the 7- position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • R 3 groups include those shown below in Table 2.
  • Ring A is a 5-7-membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein ring A is optionally substituted with y independent occurrences of -R 5 , wherein y is 0-5, and is additionally optionally substituted with q independent occurrences of R 5a , wherein q is 0-2.
  • ring A is selected from:
  • ring A is selected from optionally substituted phenyl, 2-pyridyl, 3-pyridyl, or 4-pyridyl, or pyrrol-1-yl.
  • y is 0-5, q is 0-2, and R and R 5a groups, when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -
  • NR'SO 2 R' -OP(O)(OR') 2 , -P(O)(OR') 2 , -OP(O) 2 OR', -P(O) 2 OR', -PO(R') 2 , -OPO(R') 2 , or an optionally substituted group selected from .C ⁇ aliphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, arylCi-C ⁇ alkyl, heteroarylC_-C 6 alkyl, cycloaliphaticC . -C ⁇ alkyl, or heterocycloaliphaticCrC 6 alkyl.
  • y is 0-5, and q is 1 or 2, and each occurrence of R 5a is independently Cl, Br, F, CF 3 , Me, Et, CN, -COOH, -NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -
  • y is 0, and q is 1 and R 5a is F. In yet other embodiments, y is 0, q is 1, and R 5a is OR'. In still other embodiments, y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 0, q is 2 and one occurrence of R 5a is OR' and the other occurrence of R 5a is F. In yet other embodiments, y is 0, q is 2 and one occurrence of
  • R 5a is OH and the other occurrence of R 5a is F.
  • ring A is phenyl, y is 0, and q is 1 and R 5a is F substituted at the 2-position of the phenyl ring.
  • ring A is phenyl, y is 0, q is 1, and R 5a is OR' substituted at the 2-position of the phenyl ring.
  • ring A is phenyl, y is 0, q is 1 and R 5a is OH substituted at the 2-position of the phenyl ring.
  • ring A is phenyl, y is 0, q is 2 and one occurrence of
  • R 5a is OR' and the other occurrence of R 5a is F, wherein OR' is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring.
  • ring A is phenyl
  • y is 0, q is 2 and one occurrence of R 5a is OH and the other occurrence of R 5a is F, wherein OH is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring.
  • R 5 and R 5a groups include those shown below in Table 2.
  • compounds of the invention are useful as inhibitors of ion channels, preferably voltage gated sodium channels and N-type calcium channels.
  • compounds of the invention are useful as inhibitors of NaV 1.8.
  • compounds of the invention are useful as inhibitors of NaV1.8 and CaV2.2.
  • compounds of the invention are useful as inhibitors of CaV2.2.
  • compounds of the invention are useful as dual inhibitors of NaV1.8 and a TTX-sensitive ion channel such as NaV1.3 or NaV1.7.
  • R 1 and R 2 taken together with the nitrogen atom to which they are bound, form an optionally substituted 3-12-membered monocyclic or bicyclic saturated, partially unsaturated, or fully unsaturated ring having 0-3 additional heteroatoms independently selected from nitrogen, sulfur, or oxygen; wherein the ring formed by R 1 and R 9 taken together, is optionally substituted at one or more substitutable carbon, nitrogen, or sulfur atoms with z independent occurrences of -R 4 , wherein z is 0-5;
  • Ring A is a 5-7-membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein ring A is optionally substituted with y independent occurrences of -R 5 , wherein y is 0-5, and is additionally optionally substituted with q independent occurrences of R 5a , wherein q is 0-2; x is 0-4; each occurrence of R 3 , R 4 , and R 5 is independently Q-R x ; wherein Q is a bond or is a - alkylidene chain wherein up to two non-adjacent methylene units of Q are optionally and independently replaced by -NR-, -S-, -O-, -CS-, -CO 2 -, -
  • R 1 and R 2 taken together with the nitrogen atom to which they are bound, form an optionally substituted 4-membered monocyclic saturated or partially unsaturated ring having 0-3 additional heteroatoms independently selected from nitrogen, sulfur, or oxygen; then 2-Oxazolidinone, 3-[(3R,4R)-2-oxo-l-(2-phenyl-4-quinazolinyl)-4-[2-(3- pyridinyl)ethenyl]-3-azetidinyl]-4-phenyl-, (4S)- is excluded; b.
  • R 1 and R 2 taken together with the nitrogen atom to which they are bound, form an optionally substituted 5-membered monocyclic saturated or partially unsaturated ring having 0-3 additional heteroatoms independently selected from nitrogen, sulfur, or oxygen; then: i. ring A is not optionally substituted hexahydro-lH-l,4-diazepin-l-yl; and ii.
  • Benzenesulfonamide 2-methoxy-5-[2-[[l-(2-phenyl-4-quinazolinyl)-3- pyrrolidinyl]amino]ethyl]-, (R)-, bis(trifluoroacetate), and Benzenesulfonamide, 2-methoxy- 5-[2-[[l-(2-phenyl-4-quinazolinyl)-3-pyrrolidinyl]amino]ethyl]-, (S)-, bis(trifluoroacetate) are excluded; iii.
  • R 1 and R 2 taken together are pyrrolidin-1-yl, x is 0 and ring A is unsubstituted phenyl, then the pyrrolidin-1-yl group is not substituted at the 3-position with - OH or 2-methoxy-phenoxy; viii.
  • ring A is not 2,3-xylyl, 3-methylphenyl, unsubstituted phenyl, 4-bromo-phenyl, 4- chloro-phenyl, 3-nitro-phenyl, unsubstituted pyrid-3-yl, 2,4-dichlorophenyl, 3,4- dichlorophenyl, 4-propoxyphenyl, 3-methylphenyl, 3,4,5-trimethoxyphenyl, 2-chlorophenyl, unsubstituted pyrid-4-yl, 2-hydroxyphenyl, or 4-(l,l-dimelhylelhyl)phenyl; c.
  • R 1 and R 2 taken together with the nitrogen atom to which they are bound, form an optionally substituted 6-membered monocyclic or bicyclic saturated or partially unsaturated ring having 0-3 additional heteroatoms independently selected from nitrogen, sulfur, or oxygen; then: i.
  • R 1 and R 9 taken together form an unsubstituted morpholino ring, and ring A is unsubstituted phenyl, then x is not 0, or if x is 1 or 2, then R 3 is not: 6-fluoro, 6,7- dimethoxy, 6-nitro, 6-AcHN-, 6-methox, 6-NH2, 6-OCHN-, 6-OH, 6-AcMeN-, 6-TsHN-, 6- Me2N-, 7-OH, 6-amino-thiazol-2-yl, 6-NHCOCOOEt, or 6-(4- ⁇ henyl-amino-thiazol-2-yl); ii.
  • R 1 and R 2 taken together form an unsubstituted morpholino ring, and ring A is unsubstituted cyclohexyl, unsubstituted pyrid-3-yl, unsubstituted 2-furyl, 2-fluorophenyl, 3-thienyl, benzofuran, pyridazine, phenyl substituted in one or more of the 3, 4, or 5-position of the phenyl ring, and x is 1 or 2, then R 3 is not 6-NH 2 , 6-OHCHN-, 6-OH, 7-OH, 6-MsHN-, 6-AcHN-, 6-fluoro, or 6-OMe; iii.
  • R 1 and R 2 taken together, form a piperid-4-one, piperid-4-ol, or thiomorpholino, or a dimethyl substituted morpholino ring, ring A is unsubstituted phenyl, and x is 1, then R 3 is not 6-OH; iv. when x is 0 and A is unsubstituted phenyl, 3,4,5-trimethoxyphenyl, or 3,4- dimethoxyphenyl, then R 1 and R 2 , taken together is not optionally substituted piperidinyl or optionally substituted piperazinyl; v.
  • R 1 and R 2 taken together is not optionally substituted piperidin-1-yl, piperazin-1-yl, or morpholin-1-yl; vi. when x is 0 and ring A is unsubstituted phenyl, then R 1 and R 2 , taken together is not optionally substituted or fused piperazinyl; vii. when x is 0 and ring A is phenyl optionally substituted in one or more of the 3-,4-
  • R and R taken together is not optionally substituted piperazin-1-yl, or morpholin-1-yl; viii. when x is 0 and ring A is 2-F-phenyl, then R 1 and R 2 , taken together is not 4-(2- Cl-phenyl)-piperazin-l-yl, 4-(3-Cl-phenyl)-piperazin-l-yl, or unsubstituted morpholin-1-yl; ix.
  • R 1 and R 2 taken together is not unsubstituted morpholin-1-yl, 4-Me-piperazin-l-yl, 4-Et-piperazin-l-yl, 4-phenyl-piperazin- 1-yl, or 4-CH 2 Ph 2 -piperazin-l-yl; x.
  • R 1 and R 2 taken together is not 4-Ph-piperazin-l- yl, 4-(3-CF 3 -phenyl)-piperazin-l-yl, 4-(2-OEt-phenyl)-piperazin-l-yl, 4-Me-piperazinyl, or unsubstituted morpholin-1-yl; xii when x is 0, and ring A is unsubstituted pyrid-3-yl or pyrid-4-yl, then R 1 and R 2 , taken together is not optionally substituted morpholin-1-yl, or optionally substituted piperazin-1-yl; xiii.
  • ring A is not 2-OH-phenyl, 4-OMe-phenyl, 4-F-phenyl, 4-NO 2 -phenyl, pyrid-3-yl, pyrid-4-yl, 2-Cl-phenyl, 4-O n Pr-phenyl, 3,4-dichlorophenyl, 2-F-phenyl, 4-Br-phenyl, 4-Cl-phenyl, 3- NO 2 -phenyl, or 2,4-dichlorophenyl; xviii.
  • ring A is 4-Br-phenyl, 2-F-phenyl, 2-Cl-phenyl, 4-Cl-phenyl, 4- OnPr-phenyl, 2,4-dichlorophenyl, 3,4-dichlorophenyl, 4-Me-phenyl, 3-Me-phenyl, pyrid-3- yl, pyrid-4-yl, 2-OH-phenyl, 4-NO 2 -phenyl, 4-tBu-phenyl, then R 1 and R 2 , taken together is not 2-Me-piperidin-l-yl, 4-CH 2 -Ph-piperidin-l-yl, 4-Me-piperidin-l-yl, 3-COOEt-piperidin- 1-yl, 4-COOEt-piperidin-l-yl, 2-Et-piperidin-l-yl, 3-Me-piperidin-yl, 3,5-diMe-piperidin- 1-yl, 4-CON
  • R 3 is 6-Br, 6-C1, 6-OH, 6-OMe, or 6-Me and ring A is 4- bromophenyl, 4-CH 2 P(O)(OH)(OEt)phenyl, or unsubstituted phenyl, then R 1 and R 2 , taken together, is not optionally substituted piperidinyl; xx.when x is 2, and R is 6,7-dimethoxy, and A is unsubstituted phenyl, then R and R 2 , taken together is not l,4-dioxa-8-azaspiro[4.5]decane or 3,4-dihydro-2(lH)-isoquinolinyl; xxi.
  • R and R taken together, is not 4-phenyl-piperidin-l-yl, 4- (4-Cl-phenyl)-piperazin-l-yl, unsubstituted piperazin-1-yl, 4-CH 2 Ph-piperazin-l-yl, 4(2-Cl- phenyl)piperazin-l-yl, or 4-COOEt-piperazin-l-yl; c.
  • R 1 and R 2 taken together with the nitrogen atom to which they are bound, form an optionally substituted 7-membered monocyclic or bicyclic saturated or partially unsaturated ring having 0-3 additional heteroatoms independently selected from nitrogen, sulfur, or oxygen; then: i. Benzenesulfonamide, 2-methoxy-5-[2-[5-(2-phenyl-4-quinazolinyl)-2,5- diazabicyclo[2.2.1]hept-2-yl]ethyl]-, and bis(trifluoroacetate) 2,5- Diazabicyclo[2.2.1]heptane, 2-(2-phenyl-4-quinazolinyl)- are excluded; ii.
  • ring A is not unsubstituted phenyl, 4-F-phenyl, 4-NO 2 -phenyl, pyrid-4-yl, 3,4-diCl- ⁇ henyl, 2-Cl-phenyl, 2,4-diCl-phenyl, 2,4-diCl-phenyl, 3-NO 2 -phenyl, 4-Cl-phenyl, 4-O n Pr- ⁇ henyl, 3-Me-phenyl, 3, 4-OMe-phenyl, 3,4,5-OMe-phenyl, pyrid-3-yl, or 2-OH- phenyl; d.
  • R and R taken together with the nitrogen atom to which they are bound, form an optionally substituted 8-membered monocyclic or bicyclic saturated or partially unsaturated ring having 0-3 additional heteroatoms independently selected from nitrogen, sulfur, or oxygen; then: i.
  • R 1 and R 2 taken together are optionally substituted azetidin-1-yl (jj), pyrrolidin-1-yl (ff), piperidinl-yl (dd), piperazin- 1-yl (cc), or morpholin-4-yl (ee).
  • R 1 and R 2 taken together are optionally substituted azetidin-1-yl (jj), pyrrolidin-1-yl (ff), piperidinl-yl (dd), or piperazin-1-yl (cc).
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj). In yet other embodiments, for compounds of formula I-A, R 1 and R 2 , taken together is optionally substituted pyrrolidin-1-yl (ff). In still other embodiments, for compounds of formula I-A, R 1 and R 2 , taken together is optionally substituted piperidinl-yl (dd). In yet other embodiments,
  • R 4 groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR ⁇ -SR', - CH 2 SR', -COOR', -NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', -NHCOOR', -SO 2 R', - SO 2 N(R') 2 , or an optionally substituted group selected from .C ⁇ aliphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, aryl -Cgalkyl, heteroaryl -C ⁇ alkyl, cycloaliphaticd- C 6 alkyl, or heterocycloaliphaticC Cealkyl.
  • R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, -COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, -NHCOCH 3 , -SO 2 NH 2 , -SO 2 (CH 2 ) 3 CH 3 , -SO 2 CH(CH 3 ) 2 , - SO 2 N(CH 3 ) 2 , -SO 2 CH 2 CH 3 , -C(O)OCH 2 CH(CH 3 ) 2 , -C(O)NHCH 2 CH(CH 3 ) 2 , -NHCOOCH 3 , - C(O)C(CH 3 ) 3 , -C(O)NHCH 2 CH(CH 3 ) 2 ,
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 or 2 and at least one occurrence of R 4 is -NRSO 2 R', -NRCOOR', or -NRCOR'.
  • azetidin-1-yl jj
  • z is 1 or 2 and at least one occurrence of R 4 is -NRSO 2 R', -NRCOOR', or -NRCOR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 or 2 and at least one occurrence of R 4 is Cl, Br, F, CF 3 , CH 3 , -CH CH 3 , -OR', or -CH 2 OR', -NRSO 2 R', - NRCOOR', or -OCON(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is — NRSO 2 R',.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is - NRCOOR'.
  • dd piperidin-1-yl
  • cc piperazin-1-yl
  • R 1 and R 2 taken together is optionally substituted ⁇ iperazin-1-yl (cc), wherein z is 1 and R 4 is -SOR'.
  • cc ⁇ iperazin-1-yl
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -COOR'.
  • piperazin-1-yl cc
  • z is 1 and R 4 is -CON(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -SO 2 N(R') 2 .
  • R and R taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -COR'.
  • x is 0-4, and R 3 groups, when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR',
  • x is 1 or 2
  • R 3 is independently
  • NHCOCH(CH 3 ) 2 -SO 2 NH 2 , -CONH(cyclopropyl), -CONHCH 3 , -CONHCH 2 CH 3 , or an optionally substituted group selected from -piperidinyl, piperizinyl, morpholino, phenyl, phenyloxy, benzyl, or benzyloxy.
  • x is 1 or 2 and each R 3 group is independently halogen, CN, optionally substituted C ⁇ -C 6 alkyl, OR', N(R') 2 , CON(R') 2 , or NRCOR'.
  • x is 1 or 2
  • each R group is -Cl, -CH 3 , -CH 2 CH 3 , -
  • x is 1 and R is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -
  • x is 1 and R is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • ring A is a group selected from:
  • ring A is optionally substituted phenyl, 2-pyridyl, 3- pyridyl, or 4-pyridyl, or pyrrol- 1-yl.
  • R 5 and R 5a groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , - CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', - -NRCOR', -CON(R') 2 , -S(O) 2 N(R') 2 , - OCOR', -COR', -CO 2 R', -OCON(R') 2 , -NR'SO 2 R', -OP(O)(OR') 2 , -P(O)(OR') 2 , - OP(O) 2 OR', -P(O) 2 OR', -PO(R') 2 , -OPO(R') 2 , or an optionally substituted group selected from Q.
  • y is 0-5, and q is 1 or 2, and each occurrence of R 5a is independently Cl, Br, F, CF 3 , Me, Et, CN, -COOH, -NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , - O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -OCH 3 , -OCH 2 CH 3 , -CH 2 OH, -NHCOCH,, - SO 2 NH 2 , -SO 2 NHC(CH 3 ) 2 , -OCOC(CH 3 ) 3 , -OCOCH 2 C(CH 3 ) 3 , -O(CH 2 ) 2 N(CH 3 ) 2 , 4-CH 3 - piperazin-1-yl, OCOCH(CH 3 ) 2 , OCO(cyclopent
  • y is 0, and q is 1 and R 5a is F. In yet other embodiments, y is 0, q is 1, and R 5a is OR'. In still other embodiments, y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 0, q is 2 and one occurrence of R 5a is OR' and the other occurrence of R 5a is F. In yet other embodiments, y is 0, q is 2 and one occurrence of R 5a is OH and the other occurrence of R 5a is F.
  • ring A is optionally substituted phenyl and compounds have the structure IA- ⁇ :
  • R 5 is independently an optionally substituted Q-Cealiphatic group, halogen, -OR', -SR', -N(R') 2 , -NR'COR', -NR'CON(R') 2 , -NR'CO 2 R', -COR', - CO 2 R', -OCOR', -CON(R') 2 , -OCON(R') 2 , -SOR', -SO 2 R', -SO 2 N(R') 2 , -NR'SO 2 R', - NR'SO 2 N(R') 2 , -COCOR', -COCH 2 COR', -OP(O)(OR') 2 , -P(O)(OR') 2 , -OP(O) 2 OR', - P(O) 2 OR ⁇ -PO(R') 2
  • the ring formed by R 1 and R 2 taken together is selected from: cc dd ee
  • R and R taken together are optionally substituted azetidin-1-yl (jj), pyrrolidin-1-yl (ff), piperidinl-yl (dd), piperazin- 1-yl (cc), or morpholin-4-yl (ee).
  • R 1 and R 2 taken together are optionally substituted azetidin-1-yl (jj), pyrrolidin-1-yl (ff), piperidinl-yl (dd), or piperazin-1-yl (cc).
  • for compounds of formula IA-i R and R taken together are optionally substituted azetidin-1-yl (jj), pyrrolidin-1-yl (ff), piperidinl-yl (dd), or piperazin-1-yl (cc).
  • R 4 groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', - COOR', -NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', -NHCOOR', -SO 2 R', -SO 2 N(R') 2 , or an optionally substituted group selected from Ci.C ⁇ aliphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, arylCrC ⁇ alkyl, heteroarylQ-Cealkyl, cycloaliphaticd-C ⁇ alkyl, or heterocycloaliphaticd-C ⁇ alkyl.
  • R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, -COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , - O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, -NHCOCH 3 , -SO 2 NH 2 , -SO 2 (CH 2 ) 3 CH 3 , -SO 2 CH(CH 3 ) 2 , -SO 2 N(CH 3 ) 2 , -SO 2 CH 2 CH 3 , -C(O)OCH 2 CH(CH 3 ) 2 ,
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 or 2 and at least one occurrence of R 4 is -NRSO 2 R', -NRCOOR', or -NRCOR'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRSO 2 R'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is - NRCOOR'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRCOR'.
  • R 1 and R 2 taken together is optionally substituted pyrrolidin-1-yl (ff), wherein z is 1 or 2 and R 4 is Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , - OR', or -CH 2 OR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 or 2 and at least one occurrence of R 4 is Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR', -NRSO 2 R', - NRCOOR', or -OCON(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is — NRSO 2 R',.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is -NRCOOR'.
  • dd piperidin-1-yl
  • cc piperazin-1-yl
  • R 4 is -SOR', -CON(R') 2 , -SO 2 N(R') 2 , -COR', or -COOR'.
  • x is 0-4, and R 3 groups, when present, are each independently halogen, CN, NO , -N(R') 2 , -CH 2 N(R') 2 , -OR', -
  • x is 1 or 2
  • R 3 is independently
  • NHCOCH(CH 3 ) 2 -SO 2 NH 2 , -CONH(cyclopropyl), -CONHCH 3 , -CONHCH 2 CH 3 , or an optionally substituted group selected from -piperidinyl, piperizinyl, morpholino, phenyl, phenyloxy, benzyl, or benzyloxy.
  • x is 1 or 2 and each R 3 group is independently halogen
  • CN optionally substituted d-C 6 alkyl, OR', N(R') 2 , CON(R') 2 , or NRCOR'.
  • x is 1 or 2
  • each R 3 group is -Cl, -CH 3 , -CH 2 CH 3 , -
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • y is 0-5, q is 0-2, and R 5 and R 5a groups, when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -
  • y is 0-5, and q is 1 or 2, and each occurrence of R 5a is independently Cl, Br, F, CF 3 , Me, Et, CN, -COOH, -NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -
  • R 4 groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', -COOR', -NRCOR', - CON(R') 2 , -OCON(R') 2 , COR', -NHCOOR', -SO 2 R ⁇ -SO 2 N(R') 2 , or an optionally substituted group selected from d.Cealiphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, aryld-C 6
  • R groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', -COOR', -NRCOR', - CON(R') 2 , -OCON(R') 2 , COR', -NHCOOR', -SO 2 R ⁇ -SO 2 N(R') 2 , or an optionally substituted group selected from d.Cealiphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, aryld-Cealkyl, heteroarylCrCealkyl, cycloaliphaticd-Cealkyl, or heterocycloaliphaticd-Cealkyl.
  • R groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', - -NRCOR', -CON(R') 2 , - S(O) 2 N(R') 2 , -OCOR', -COR', -CO 2 R', -OCON(R') 2 , -NR'SO 2 R', -OP(O)(OR') 2 , - P(O)(OR') 2 , -OP(O) 2 OR', -P(O) 2 OR', -PO(R') 2 , -OPO(R') 2 , or an optionally substituted group selected from d-Cealiphatic, aryl, heteroaryl, cycloaliphatic, heterocyclo
  • R and R taken together is an optionally substituted ring selected from azetidin-1- yl (Jj) > pyrrolidin-1-yl (ff), piperidinl-yl (dd), or piperazin-1-yl (cc);
  • b) z is 0-5 and R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, - COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, - NHCOCHs, -SO 2 NH 2 , -SO 2 (CH 2 ) 3 CH 3 , -SO 2 CH(CH 3 ) 2 , -SO 2 N(CH 3 ) 2
  • R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , - CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , - CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , - NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'. [00114] In yet other embodiments, x is 1 and R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • R 5a is Cl, F, CF 3 , Me, Et, OR', -OH, -OCH 3 , -
  • R 5a is OR' . In still other embodiments, R 5a is F.
  • R 1 and R 2 taken together is an optionally substituted ring selected from azetidin-1- yl (jj), pyrrolidin-1-yl (ft), piperidinl-yl (dd), or piperazin-1-yl (cc);
  • b) z is 0-5 and R 4 groups are each independently Cl, Br, F, CF , CH 3 , -CH 2 CH 3 , CN, - COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, - NHCOCH 3 , -SO 2 NH 2 , -SO 2 (CH 2 ) 3 CH 3 , -SO 2 CH(CH 3 ) 2 , -SO 2 N(CH 3 ) 2 ,
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , - CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R is at the 7-position of the quinazoline ring and is -Cl, - CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), - OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 6- position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • R 5a is OR' and x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 5a is OR' and x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 5a is OH and x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 5a is OH and x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 5a is F and x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 5 is F and x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRSO 2 R'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRCOOR' .
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRCOR'.
  • R and R taken together is optionally substituted pyrrolidin-1-yl (ff), wherein z is 1 or 2 and R 4 is Cl, Br, F, CF 3 , CH 3 , - CH 2 CH 3 , -OR', or -CH 2 OR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 or 2 and at least one occurrence of R 4 is Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR', -NRSO 2 R', - NRCOOR', or -OCON(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR'.
  • z is 1 and R 4 is — NRSO 2 R', for compounds of formula IA-ii, R 1 and R 2 , taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is — NRSO 2 R',.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is -NRCOOR'.
  • dd piperidin-1-yl
  • z is 1 and R 4 is -NRCOOR'.
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 or 2 and at least one occurrence of R 4 is -SOR', -CON(R') 2 , -SO 2 N(R') 2 , -COR', or -COOR'.
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -SOR'.
  • compounds are useful as inhibitors of ion channels, preferably voltage gated sodium channels and N-type calcium channels.
  • compounds of the invention are useful as inhibitors of NaV1.8.
  • compounds of the invention are useful as inhibitors of NaV1.8 and CaV2.2.
  • compounds of the invention are useful as inhibitors of CaV2.2.
  • compounds of the invention are useful as dual inhibitors of NaV1.8 and a TTX-sensitive ion channel such as NaV1.3 or NaV1.7.
  • R 1 and R 2 are each independently an optionally substituted group selected from C 1-6 aliphatic, Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10- membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted Ci- aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -
  • R and R are each optionally and independently substituted at one or more substitutable carbon, nitrogen, or sulfur atoms with z independent occurrences of -R 4 , wherein z is 0-5; x is 0-4; y is 0-4; each occurrence of R 3 , R 4 , and R 5 is independently Q-R x ; wherein Q is a bond or is a Ci-C ⁇ alkylidene chain wherein up to two non-adjacent methylene units of Q are optionally and independently replaced by -NR-, -S-, -O-, -CS-, -CO 2 -, -OCO-, -CO-, -COCO-, -CONR-, -NRCO-, -NRCO 2 -, -SO 2 NR-, -NRSO 2 -, -CONRNR-, -NRCONR-, -OCONR-, -NRNR-, -NRSO 2 -, -CONRNR-
  • R 5a is an optionally substituted d-C 6 aliphatic group, halogen, -OR', -SR', -N(R') 2 , - NR'COR', -NR'CON(R') 2 , -NR'CO 2 R', -COR', -CO 2 R', -OCOR', -CON(R') 2 , - OCON(R') 2 , -SOR', -SO 2 R', -SO 2 N(R') 2 , -NR'SO 2 R', -NR'SO 2 N(R') 2 , -COCOR', - COCH 2 COR', -OP(O)(OR') 2 , -P(O)(OR') 2 , -OP(O) 2 OR', -P(O) 2 OR', -PO(R') 2 , or - OPO(R') 2 ; and each occurrence of R is independently
  • R 1 when x is 0, R 1 is hydrogen, and R 5a is Cl, Me, CF 3 , Br, or F, then R 2 is not - (CH 2 ) 2 -4-Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-8-membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur; b. when x is 0, and R a is Cl, Me, NO 2 , or OH, then: i. when R 1 is hydrogen, R 2 is not Me, iBu, nBu, -COCH 3 , -CH 2 COOEt, -
  • R 1 or R 2 is hydrogen, and the other of R 1 and R 2 is selected from: i) Cy 1 wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1- aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or ii) an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1- aliphatic group are optionally replaced with -NR-, -O-, - COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or b) R 1 and R 2 are each
  • R 1 is
  • R 9 1 hydrogen or an optionally substituted d-C 4 aliphatic group and R is -CHR-Cy , wherein R is hydrogen or d-C alkyl, and Cy 1 is:
  • R 1 and R 2 groups are each independently an optionally substituted C 1-4 aliphatic group and are each independently selected from optionally substituted methyl, ethyl, cyclopropyl, n-propyl, propenyl, cyclobutyl, (CO)OCH 2 CH 3 , (CH 2 ) 2 OCH 3 , CH 2 CO)OCH 2 CH 3 , CH 2 (CO)OCH 3 , CH(CH 3 )CH 2 CH 3 , or n-butyl.
  • R 4 groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', - CH 2 SR', -COOR', -NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', -NHCOOR', -SO 2 R', - SO 2 N(R') 2 , or an optionally substituted group selected from d.C ⁇ aliphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, arylC_-C 6 alkyl, heteroaryld-C 6 alkyl, cycloaliphaticd- C 6 alkyl, or heterocycloaliphaticd-C ⁇ alkyl.
  • R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, -COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , - COOCH 3 , -OH, -CH 2 OH, -NHCOCH 3 , -SO 2 NH 2 , -SO 2 (CH 2 ) 3 CH 3 , -SO 2 CH(CH 3 ) 2 , - SO 2 N(CH 3 ) 2 , -SO 2 CH 2 CH 3 , -C(O)OCH 2 CH(CH 3 ) 2 , -C(O)NHCH 2 CH(CH 3 ) 2 , -NHCOOCH 3 , -
  • x is 0-4.
  • R 3 groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -
  • x is 1 or 2
  • each occurrence of R 3 is independently Cl, Br, F, CF 3 , -OCF 3 , Me, Et, CN, -COOH, -NH 2 , -
  • CONHCH 2 CH 3 or an optionally substituted group selected from -piperidinyl, piperizinyl, morpholino, phenyl, phenyloxy, benzyl, or benzyloxy.
  • x is 1 or 2 and each R group is independently halogen, CN, optionally substituted C C 6 alkyl, OR', N(R') 2 , CON(R') 2 , or NRCOR'.
  • x is 1 or 2
  • each R 3 group is -Cl, -CH 3 , -CH 2 CH 3 , -
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 3 is at the 6-position of the quinazoline ring and is -
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • R 5 and R 5a groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', - CH 2 OR', -SR', -CH 2 SR', - -NRCOR', -CON(R') 2 , -S(O) 2 N(R') 2 , -OCOR', -COR', -CO 2 R', - OCON(R') 2 , -NR'SO 2 R', -OP(O)(OR') 2 , -P(O)(OR') 2 , -OP(O) 2 OR', -P(O) 2 OR', -PO(R') 2 , - OPO(R') 2 , or an optionally substituted group selected from d.C ⁇ aliphatic,
  • y is 0-4, and q is 1 or 2, and each occurrence of R 5a is independently Cl, Br, F, CF 3 , Me, Et, CN, -COOH, -NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , - O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -OCH 3 , -OCH 2 CH 3 , -CH 2 OH, -NHCOCH 3 , - SO 2 NH 2 , -SO 2 NHC(CH 3 ) 2 , -OCOC(CH 3 ) 3 , -OCOCH 2 C(CH 3 ) 3 , -O(CH 2 ) 2 N(CH 3 ) 2 , 4-CH 3 - piperazin-1-yl, OCOCH(CH 3 ) 2 , OCO(cyclopent
  • y is 0, and R 5a is F. In yet other embodimentsy is 0, q is 1, and R 5a is OR'. In still other embodiments, y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 1, R 5 is OR' and R 5 is F, wherein OR' is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring. In yet other embodiments, y is 1, R 5a is OH and R 5 is F, wherein OH is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring.
  • one of R 1 or R 2 is hydrogen, and the other of R 1 and R 2 is selected from Cy 1 , wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1- aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -, or an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, - NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or R 1 and R 2 are each independently
  • aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, - SO 2 NR-, or -NRSO 2 -; or Cy 1 wherein Cy 1 is bonded to the nitrogen atom directly or is bonded through an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, - NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; b) z is 0-5 and R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, - COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , - CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, - CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), - OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 6- position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or - OCH 2 CH 3 .
  • x is 1 and R is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • R 5a is Cl, F, CF 3 , Me, Et, -OH, -OCH 3 , -OCH 2 CH 3 .
  • y is 0, and R 5a is F. In yet other embodimentsy is 0, q is 1, and R 5a is OR'. In still other embodiments, y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 1, R 5a is OR' and R 5 is F, wherein OR' is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring. In yet other embodiments, y is 1, R 5a is OH and R 5 is F, wherein OH is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring.
  • one of R 1 or R 2 is hydrogen, and the other of R 1 and R 2 is selected from Cy 1 , wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1-4 aliphalic group, wherein one or more methylene units in the C 1- aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -, or an optionally substituted C 1- aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, - NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or R 1 and R 2 are each independently selected
  • R and R are each independently an optionally substituted C 1-4 aliphatic group and are each independently selected from optionally substituted methyl, ethyl, cyclopropyl, n-propyl, propenyl, cyclobutyl, (CO)OCH 2 CH 3 , (CH 2 ) 2 OCH 3 , CH 2 CO)OCH 2 CH 3 , CH 2 (CO)OCH 3 , CH(CH 3 )CH 2 CH 3 , or n-butyl; b) z is 0-5 and R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, - COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, - NHCOCH 3 ,
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , - CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R is at the 7-position of the quinazoline ring and is -Cl, - CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), - OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 6- position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or - OCH 2 CH 3 .
  • x is 1 and R is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'. In yet other embodiments, x is 1 and R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'. In still other embodiments, R 5a is Cl, F, CF 3 , Me, Et, -OH, - OCH 3 , -OCH 2 CH 3 .
  • y is 0, and R 5 is F. In yet other embodimentsy is 0, q is 1, and R 5a is OR'. In still other embodiments, y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 1, R 5a is OR' and R 5 is F, wherein OR' is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring. In yet other embodiments, y is 1, R 5a is OH and R 5 is F, wherein OH is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring.
  • compounds are useful as inhibitors of ion channels, preferably voltage gated sodium channels and N-type calcium channels.
  • compounds of the invention are useful as inhibitors of NaV1.8.
  • compounds of the invention are useful as inhibitors of NaVl.8 and CaV2.2.
  • compounds of the invention are useful as inhibitors of CaV2.2.
  • compounds of the invention are useful as dual inhibitors of NaV1.8 and a TTX-sensitive ion channel such as NaV1.3 or NaV1.7.
  • R and R are each independently an optionally substituted group selected from d- ⁇ aliphatic, Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10- membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C ⁇ .
  • aliphatic group wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -
  • R and R are each optionally and independently substituted at one or more substitutable carbon, nitrogen, or sulfur atoms with z independent occurrences of -R 4 , wherein z is 0-5; x is 1 and R is substituted at either the 6- or 7-position of the quinazoline ring; y is 0-4; q is 0, 1 or 2; each occurrence of R 3 , R 4 , and R 5 is independently Q-R x ; wherein Q is a bond or is a d-C 6 alkylidene chain wherein up to two non-adjacent methylene units of Q are optionally and independently replaced by -NR-, -S-, -O-, -CS-, -CO 2 -, -OCO-, -CO-, -COCO-, -CONR-, -NRCO-, -NRCO 2 -, -SO 2 NR-, -NRSO 2 -, -CONRNR-, -, -CONR
  • R 3 when R 3 is at the 7-position of the quinazoline ring then: i) when R is Cl or Me, ring A is unsubstituted naphthyl, and R is hydrogen, then R 2 is not -(CH 2 ) 3 NMe 2 ; ii) when R 3 is Cl, the sum of q and y is 1 and the phenyl ring is substituted at the 4-position with Br, and R 1 is hydrogen, then R 2 is not Cy 1 , wherein Cy 1 is bonded to the nitrogen atom through an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, - OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; iii) when R 3 is Cl or OMe
  • R 9 is not Me, nBu, or -(CH 2 ) morpholino, or R 1 and R9 are not simultaneously Me or Et;
  • R 1 or R 2 is hydrogen, and the other of R 1 and R 2 is selected from: i) Cy 1 wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1- aliphatic group, wherein one or more methylene units in the C M aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or ii) an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, - COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or b) R 1 and R 2 are each
  • Cy 1 is:
  • R 1 is hydrogen or an optionally substituted C_- C 4 aliphatic group and R 2 is -CHR-Cy 1 , wherein R is hydrogen or C_-C alkyl, and Cy 1 is:
  • R and R groups are each independently an optionally substituted C 1-4 aliphatic group and are each independently selected from optionally substituted methyl, ethyl, cyclopropyl, n-propyl, propenyl, cyclobutyl, (CO)OCH 2 CH 3 , (CH 2 ) 2 OCH 3 , CH 2 CO)OCH 2 CH 3 , CH 2 (CO)OCH 3 , CH(CH 3 )CH 2 CH 3 , or n-butyl.
  • R 4 groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , - OR', -CH 2 OR', -SR', -CH 2 SR', -COOR', -NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', - NHCOOR', -SO 2 R', -SO 2 N(R') 2 , or an optionally substituted group selected from d.
  • z is 0-5 and R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, -COOH, -N(CH 3 ) 2.
  • R 3 is halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', -COOR', - NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', -NHCOOR', -SO 2 R', -SO 2 N(R') 2 , or an optionally substituted group selected from d-daliphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, aryld-Cealkyl, heteroaryld-C ⁇ alkyl, cycloaliphaticd-C 6 alkyl, or heterocycloaliphaticCrC ⁇ alkyl.
  • R 3 is Cl, Br, F, CF 3 , -OCF 3 , Me, Et, CN, -COOH, - NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -OCH 3 , - OCH 2 CH 3 , -CH 2 OH, -NHCOCH 3 , -NHCOCH(CH 3 ) 2 , -SO 2 NH 2 , -CONH(cyclopropyl), - CONHCH 3 , -CONHCH 2 CH , or an optionally substituted group selected from -piperidinyl, piperizinyl, morpholino, phenyl, phenyloxy, benzyl, or benzyloxy.
  • R is halogen, CN, optionally substituted d-C 6 alkyl, OR', N(R') 2 , CON(R') 2 , or NRCOR'.
  • R 3 is -Cl, -CH 3 , -CH 2 CH 3 , - F, -CF 3 , -OCF 3 , -CONHCHs, -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , - OCH 2 CH 3 , or -CN.
  • R is at the 6-posilion of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , - CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , - CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , - CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 3 is at the 7- position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH , or - OCH 2 CH 3 .
  • R 3 is at the 6-position of the quinazoline ring and is - CON(R') 2 , or NRCOR'.
  • R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • R 5 and R 5a groups when present, are each independently halogen, CN, NO 2 , - N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', - -NRCOR', -CON(R') 2 , -S(O) 2 N(R') 2 , -OCOR', -COR', -CO 2 R', -OCON(R') 2 , -NR'SO 2 R', -OP(O)(OR') 2 , -P(O)(OR') 2 , - OP(O) 2 OR', -P(O) 2 OR', -PO(R') 2 , -OPO(R') 2 , or an optionally substituted group selected from d.C
  • y is 0-5, and q is 1 or 2, and each occurrence of R 5a is independently Cl, Br, F, CF 3 , Me, Et, CN, -COOH, -NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , - O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -OCH 3 , -OCH 2 CH 3 , -CH 2 OH, -NHCOCH 3 , - SO 2 NH 2 , -SO 2 NHC(CH 3 ) 2 , -OCOC(CH 3 ) 3 , -OCOCH 2 C(CH 3 ) 3 , -O(CH 2 ) 2 N(CH 3 ) 2 , 4-CH 3 - piperazin-1-yl, OCOCH(CH 3 ) 2 , OCO(cyclopen
  • y is 0, and R 5a is F. In yet other embodiments y is 0, q is 1, and R 5a is OR'. In still other embodiments, y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 1, R 5a is OR' and R 5 is F, wherein OR' is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring. In yet other embodiments, y is 1, R 5a is OH and R 5 is F, wherein OH is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring.
  • R 3 is substituted at the 6-position of the quinazoline ring, q is 1, and y is 0, and compounds have formula III:
  • R 1 and R 2 are each independently an optionally substituted group selected from Ci- ealiphatic, Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1- aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; wherein R 1 and R 2 , are each optionally substituted group selected from Ci- ealiphatic, Cy 1
  • R 3 is -Cl, - CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), - OCH 3 , -NH 2 , -OCH 2 CH 3s or -CN.
  • R 3 is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 3 is is -CON(R') 2 , or NRCOR'.
  • R 5a is Cl, F, CF 3 , Me, Et, -OH, -OCH 3 , -OCH 2 CH 3 .
  • y is 0, and R 5a is F.
  • q is 1, and R 5a is OR'.
  • y is 0, q is 1 and R 5a is OH.
  • y z aa bb or R group are each independently selected from optionally substituted methyl, ethyl, cyclopropyl, n-propyl, propenyl, cyclobutyl, (CO)OCH 2 CH 3 , (CH 2 ) 2 OCH 3 , CH 2 CO)OCH 2 CH 3 , CH 2 (CO)OCH 3 , CH(CH 3 )CH 2 CH 3 , or n-butyl; b) z is 0-5 and R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, - COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, - NHCOCH 3 , -SO 2 NH 2
  • R 3 is -Cl, -CH 3 , - CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , - NH 2 , -OCH 2 CH 3 , or -CN.
  • R 3 is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 3 is-CON(R') 2 , or NRCOR'.
  • R 5a is Cl, F, CF 3 , Me, Et, -OH, -OCH 3 , -OCH 2 CH 3 .
  • y is 0, and R 5a is F.
  • y is 0, q is 1, and R 5a is OR'.
  • y is 0, q is 1 and R 5a is OH.
  • R 3 is substituted at the 7-position of the quinazoline ring, q is 1, and y is 0, and compounds have formula IV:
  • R and R are each independently an optionally substituted group selected from C 1-6 aliphatic, Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10- membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C__ 4 aliphatic group, wherein one or more methylene units in the d ⁇ aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -
  • R and R are each optionally and independently substituted at one or more substitutable carbon, nitrogen, or sulfur atoms with z independent occurrences of -R 4 , wherein z is 0-5; b) z is 0-5 and R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, - COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, - NHCOCH 3 , -SO 2 NH 2 , -SO 2 (CH 2 ) 3 CH 3 , -SO 2 CH(CH 3 ) 2 , -SO 2 N(CH 3 ) 2 , -SO 2 CH 2 CH 3 , - C(O)OCH 2 CH(CH 3 ,
  • R 3 is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , - NH 2 , -OCH 2 CH 3 , or -CN.
  • R 3 is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , - OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 3 is is -CON(R') 2 , or NRCOR'.
  • R 5a is Cl, F, CF 3 , Me, Et, -OH, -OCH 3 , -OCH 2 CH 3 .
  • y is 0, and R 5a is F.
  • y is 0, q is 1, and R 5a is OR'.
  • y is 0, q is 1 and R 5a is OH.
  • Cy 1 is: a
  • R 1 and R 2 are each independently an optionally substituted d ⁇ aliphatic group and are each independently selected from optionally substituted methyl, ethyl, cyclopropyl, n-propyl, propenyl, cyclobutyl, (CO)OCH 2 CH 3 , (CH 2 ) 2 OCH 3 , CH 2 CO)OCH 2 CH 3 , CH 2 (CO)OCH 3 , CH(CH 3 )CH 2 CH 3 , or n-butyl; b) z is 0-5 and R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, - COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2
  • R 3 is -Cl, - CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), - OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • R 3 is -Cl, -CH 3 , -CH 2 CH 3 , -F, - CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 3 is-CON(R') 2 , or NRCOR'.
  • R 5a is Cl, F, CF 3 , Me, Et, -OH, -OCH 3 , or -OCH 2 CH 3 .
  • y is 0, and R 5a is F.
  • y is 0, q is 1, and R 5a is OR'.
  • y is 0, q is 1 and R 5a is OH.
  • compounds are useful as inhibitors of ion channels, preferably voltage gated sodium channels and N-type calcium channels.
  • compounds of the invention are useful as inhibitors of NaV1.8.
  • compounds of the invention are useful as inhibitors of NaV1.8 and CaV2.2.
  • compounds of the invention are useful as inhibitors of CaV2.2.
  • compounds of the invention are useful as dual inhibitors of NaVl.8 and a TTX-sensitive ion channel such as NaV1.3 or NaV1.7.
  • R 1 and R 2 are each independently an optionally substituted group selected from d-ealiphatic, Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10- membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted d.
  • R 1 and R 2 taken together with the nitrogen atom to which they are bound, form an optionally substituted 3-12-membered monocyclic or bicyclic saturated or partially unsaturated ring having 0-3 additional heteroatoms independently selected from nitrogen, sulfur, or oxygen; wherein R 1 and R 2 , or the ring formed by R 1 and R 2 taken together, are each optionally and independently substituted at one or more substitutable carbon, nitrogen, or sulfur atoms with z independent occurrences of -R 4 , wherein z is 0-5; x is 0-4; y is 0-2; each occurrence of R , R , and R is independently Q-R ; wherein Q is a
  • R 5a is an optionally substituted C_-C 6 aliphatic group, halogen, -OR', -SR', -N(R') 2 , - NR'COR', -NR'CON(R') 2 , -NR'CO 2 R', -COR', -CO 2 R', -OCOR', -CON(R') 2 , - OCON(R') 2 , -SOR', -SO 2 R', -SO 2 N(R') 2 , -NR'SO 2 R', -NR'SO 2 N(R') 2 , -COCOR', - COCH 2 COR', -OP(O)(OR') 2 , -P(O)(OR') 2 , -OP(O) 2 OR', -P(O) 2 OR', -PO(R') 2 , or - OPO(R') 2 ; and each occurrence of R is independently
  • R 1 is hydrogen
  • y and q are both 0, then R 2 is not -CH 2 CH 2 OCH 2 CH 2 OH or the monomelhanesulfonate salt.
  • a) one of R 1 or R 2 is hydrogen, and the other of R 1 and R 2 is selected from: i) Cy 1 wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or ii) an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, - COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or
  • R and R are each independently selected from Cy , wherein Cy is bonded directly to the nitrogen atom or is bonded through an optionally substituted C__ 4 aliphatic group, wherein one or more methylene units in the C_- 4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or - NRSO 2 -; or an optionally substituted d ⁇ aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, - COO-, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -.
  • Cy 1 is:
  • R 1 is hydrogen or an optionally substituted d- C 4 aliphatic group and R 2 is -CHR-Cy 1 , wherein R is hydrogen or d-C 4 alkyl, and Cy 1 is:
  • R 1 and R 2 groups are each independently an optionally substituted d ⁇ aliphatic group and are each independently selected from optionally substituted methyl, ethyl, cyclopropyl, n-propyl, propenyl, cyclobutyl, (CO)OCH 2 CH 3 , (CH 2 ) 2 OCH 3 , CH 2 CO)OCH 2 CH 3 , CH 2 (CO)OCH 3 , CH(CH 3 )CH 2 CH 3 , or n-butyl.
  • R 1 and R 2 taken together with the nitrogen atom to which they are bound, form an optionally substituted 3-12 membered heterocyclyl ring having 1-3 heteroatoms independently selected from nitrogen or oxygen and form a 3-12 membered heterocyclyl group selected from:
  • R 1 and R 2 taken together are optionally substituted azetidin-1-yl (jj), pyrrolidin-1-yl (ff), piperidinl-yl (dd), piperazin- 1-yl (cc), or morpholin-4-yl (ee).
  • R 1 and R 2 taken together are optionally substituted azetidin-1-yl (jj), pyrrolidin-1-yl (ff), piperidinl-yl (dd), or piperazin-1-yl (cc).
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj). In yet other embodiments, for compounds of formula I-A, R 1 and R 2 , taken together is optionally substituted pyrrolidin-1-yl (ff). In still other embodiments, for compounds of formula I-A, R 1 and R 2 , taken together is optionally substituted piperidinl-yl (dd). In yet other embodiments,
  • R 4 groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , - OR', -CH 2 OR', -SR', -CH 2 SR', -COOR', -NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', - NHCOOR', -SO 2 R', -SO 2 N(R') 2 , or an optionally substituted group selected from d.
  • R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, -COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , - COOCHs, -OH, -CH 2 OH, -NHCOCH 3 , -SO 2 NH 2 , -SO 2 (CH 2 ) 3 CH 3 , -SO 2 CH(CH 3 ) 2 , - SO 2 N(CH 3 ) 2 , -SO 2 CH 2 CH 3 , -C(O)OCH 2 CH(CH 3 ) 2 , -C(O)NHCH 2 CH(CH 3 ) 2 , -NHCOOCH 3 , - C(O)C(CH 3 ) 3 , -C(O)NHCH 2 CH(CH 3 ) 2 ,
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 or 2 and at least one occurrence of R 4 is -NRSO 2 R', -NRCOOR', or -NRCOR'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRSO 2 R'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is - NRCOOR'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRCOR'.
  • R and R taken together is optionally substituted pyrrolidin-1-yl (ff), wherein z is 1 or 2 and R 4 is Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , - OR', or -CH 2 OR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 or 2 and at least one occurrence of R 4 is Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR ⁇ -NRSO 2 R', - NRCOOR', or -OCON(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is — NRSO 2 R ⁇ .
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R is - 1 9
  • NRCOOR' for compounds of formula I-A, R and R , taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 or 2 and at least one occurrence of R 4 is -SOR', -CON(R') 2 , -SO 2 N(R') 2 , -COR', or -COOR'.
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -SOR'.
  • R 3 groups when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', - COOR', -NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', -NHCOOR', -SO 2 R', -SO 2 N(R') 2 , or an optionally substituted group selected from C_.C 6 aliphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, aryld-C 6 alkyl, heteroary
  • x is 1 or 2, and each occurrence of R 3 is independently Cl, Br, F, CF 3 , -OCF 3 , Me, Et, CN, -COOH, -NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -OCH 3 , -OCH 2 CH 3 , -CH 2 OH, - NHCOCH 3 , -NHCOCH(CH 3 ) 2 , -SO 2 NH 2 , -CONH(cyclopropyl), -CONHCH 3 , - CONHCH 2 CH 3 , or an optionally substituted group selected from -piperidinyl, piperizinyl, morpholino, phenyl, phenyloxy, benzyl, or benzyloxy
  • x is 1 or 2 and each R 3 group is independently halogen, CN, optionally substituted C C 6 alkyl, OR', N(R') 2 , CON(R') 2 , or NRCOR'.
  • x is 1 or 2 and each R group is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , - CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R is at the 6-position of the quinazoline ring and is -Cl, - CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), - OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 7- position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , - CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , - CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'. In yet other embodiments, x is 1 and R 3 is at the 7- position of the quinazoline ring and is -CON(R') , or NRCOR'.
  • R 5 and R 5a groups when present, are each independently halogen, CN, NO 2 , - N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', - -NRCOR', -CON(R') 2 , -S(O) 2 N(R') 2 , -OCOR', -COR', -CO 2 R', -OCON(R') 2 , -NR'SO 2 R', -OP(O)(OR') 2 , -P(O)(OR') 2 , - OP(O) 2 OR', -P(O) 2 OR', -PO(R') 2 , -OPO(R') 2 , or an optionally substituted group selected from d.C ⁇
  • y is 0-2, and q is 1 or 2, and each occurrence of R 5a is independently Cl, Br, F, CF 3 , Me, Et, CN, -COOH, -NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , - O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -OCH 3 , -OCH 2 CH 3 , -CH 2 OH, -NHCOCH 3 , - SO 2 NH 2 , -SO 2 NHC(CH 3 ) 2 , -OCOC(CH 3 ) 3 , -OCOCH 2 C(CH 3 ) 3 , -O(CH 2 ) 2 N(CH 3 ) 2 , 4-CH 3 - piperazin-1-yl, OCOCH(CH 3 ) 2 , OCO(cyclopen
  • y is 0, and q is 1 and R 5a is F. In yet other embodiments, y is 0, q is 1, and R 5a is OR'. In still other embodiments, y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 0, q is 2 and one occurrence of R 5a is OR' and the other occurrence of R 5a is F. In yet other embodiments, y is 0, q is 2 and one occurrence of R 5a is OH and the other occurrence of R 5a is F.
  • R 1 and R 2 taken together is an optionally substituted ring selected from azetidin-1-
  • R or R is hydrogen
  • R 1 and R 2 is selected from Cy 1 , wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1- aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O- , -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -, or an optionally substituted C_.
  • R 1 and R 2 are each independently selected from an optionally substituted Ci- 4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -S0 2 NR-, or - NRSO 2 -; or R 1 and R 2 are each independently selected from an optionally substituted Ci- 4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or - NRSO 2 -; or Cy 1 wherein Cy 1 is bonded to the nitrogen atom directly or is bonded through an optionally substituted C 1- aliphatic group, wherein one or more methylene units in the d_ 4 aliphatic group
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj). In yet other embodiments, for compounds of formula I-A, R 1 and R 2 , taken together is optionally substituted pyrrolidin-1-yl (ff). In still other embodiments, for compounds of formula I-A, R 1 and R 2 , taken together is optionally substituted piperidinl-yl (dd). In yet other embodiments, for compounds of formula I-A, R 1 and R , taken together is optionally substituted piperazin-1-yl (cc).
  • R and R taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 or 2 and at least one occurrence of R 4 is -NRSO 2 R', -NRCOOR', or -NRCOR'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRSO 2 R'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is - NRCOOR'.
  • R 1 and R 2 taken together is optionally substituted azetidin-1-yl (jj), wherein z is 1 and R 4 is -NRCOR'.
  • R 1 and R 2 taken together is optionally substituted pyrrolidin-1-yl (ff), wherein z is 1 or 2 and R 4 is Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , - OR', or -CH 2 OR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 or 2 and at least one occurrence of R 4 is Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR ⁇ -NRSO 2 R', - NRCOOR', or -OCON(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is F, CF 3 , CH 3 , -CH 2 CH 3 , -OR', or -CH 2 OR'.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is — NRSO 2 R',.
  • R 1 and R 2 taken together is optionally substituted piperidin-1-yl (dd), wherein z is 1 and R 4 is - NRCOOR'.
  • dd piperidin-1-yl
  • cc piperazin-1-yl
  • R 4 is -SOR', -CON(R') 2 , -SO 2 N(R') 2 , -COR', or -COOR'.
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -SO 2 N(R') 2 .
  • R 1 and R 2 taken together is optionally substituted piperazin-1-yl (cc), wherein z is 1 and R 4 is -COR'.
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , - CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R is at the 7-position of the quinazoline ring and is -Cl, - CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), - OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 6- position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or - OCH 2 CH 3 .
  • x is 1 and R is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'. In yet other embodiments, x is 1 and R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'. In yet other embodiments, R 5a is Cl, F, CF 3 , Me, Et, -OH, - OCH 3 , -OCH 2 CH 3 . In still other embodiments, y is 0, and q is 1 and R 5a is F. In yet other embodiments, y is 0, q is 1, and R 5a is OR'.
  • y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 0, q is 2 and one occurrence of R 5 is OR' and the other occurrence of R 5a is F. In yet other embodiments, y is 0, q is 2 and one occurrence of R 5a is OH and the other occurrence of R 5a is F.
  • Cy 1 is:
  • R 1 and R 2 are each independently an optionally substituted d ⁇ aliphatic group and are each independently selected from optionally substituted methyl, ethyl, cyclopropyl, n-propyl, propenyl, cyclobutyl, (CO)OCH 2 CH 3 , (CH 2 ) 2 OCH 3 , CH 2 CO)OCH 2 CH 3 , CH 2 (CO)OCH 3 , CH(CH 3 )CH 2 CH 3 , or n-butyl; b) z is 0-5 and R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, - COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, - NHCOCH 3
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , - CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R is at the 7-position of the quinazoline ring and is -Cl, - CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), - OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • x is 1 and R 3 is at the 6- position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or - OCH 2 CH 3 .
  • x is 1 and R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • x is 1 and R 3 is at the 6-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'. In yet other embodiments, x is 1 and R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'. In yet other embodiments, R 5a is Cl, F, CF 3 , Me, Et, -OH, - OCH 3 , -OCH 2 CH . In still other embodiments, y is 0, and q is 1 and R 5a is F. In yet other embodiments, y is 0, q is 1, and R 5a is OR'.
  • y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 0, q is 2 and one occurrence of R 5a is OR' and the other occurrence of R 5a is F. In yet other embodiments, y is 0, q is 2 and one occurrence of R 5a is OH and the other occurrence of R a is F.
  • compounds are useful as inhibitors of ion channels, preferably voltage gated sodium channels and N-type calcium channels.
  • compounds of the invention are useful as inhibitors of NaV1.8.
  • compounds of the invention are useful as inhibitors of NaV1.8 and CaV2.2.
  • compounds of the invention are useful as inhibitors of CaV2.2.
  • compounds of the invention are useful as dual inhibitors of NaV1.8 and a TTX-sensitive ion channel such as NaV1.3 or NaV1.7.
  • R 1 is selected from d- ⁇ aliphatic, Cy 1 , wherein Cy 1 is a 5-7-membered monocyclic aryl ring or an 8-10-membered bicyclic aryl ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, or is a 3-12-membered saturated or partially unsaturated monocyclic ring having 0-3 heteroatoms independently selected from nitrogen, oxygen, or sulfur, wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, - CONR-, -SO 2 NR-, or -NRSO 2 -; wherein R 1 is optionally substituted at one or more substitutable carbon, nitrogen, or sulfur
  • R 5 when R 5 is Me, Cl, or OMe, and x is 0, then R 1 is not Et or Me; b) when R 5a is Cl, x is 3, and the three occurrences of R 3 are 6-Me, 7-COOEt, and 8- Me, then R 1 is not -(CH 2 ) 2 piperidin-l-yl; c) when R 5a is Me, x is 1 and R 3 is NO 2 or NH 2 , then R 1 is not Et; d) when R 5 is OH, NHMe, or N(NO)Me, and x is 0, then R 1 is not Et, Me or - rl 2 ⁇ i— ⁇ _,rl 2 , e) when R 5a is NH 2 , and x is 0, then R 1 is not -COCH 3 ; f) when R 5a is Cl or Me, and y is 0 or 1 and when y is 1, R 5 is 4-
  • R 1 is selected from: i) Cy 1 wherein Cy 1 is bonded directly to the nitrogen atom or is bonded through an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, -COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -; or ii) an optionally substituted C 1-4 aliphatic group, wherein one or more methylene units in the C 1-4 aliphatic group are optionally replaced with -NR-, -O-, - COO, -OCO-, -NRCO-, -CONR-, -SO 2 NR-, or -NRSO 2 -.
  • Cy 1 is, a
  • R 1 is-CHR-Cy 1 , wherein R is hydrogen or C 1 -C alkyl, and Cy 1 is:
  • R 1 is an optionally substituted C 1-4 aliphatic group and are each independently selected from optionally substituted methyl, ethyl, cyclopropyl, n- propyl, propenyl, cyclobutyl, (CO)OCH 2 CH 3 , (CH 2 ) 2 OCH 3 , CH 2 CO)OCH 2 CH 3 , CH 2 (CO)OCH 3 , CH(CH 3 )CH 2 CH 3 , or n-butyl.
  • z is 0-5, and R 4 groups, when present, are each independently halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR', - COOR', -NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', -NHCOOR', -SO 2 R', -SO 2 N(R') 2 , or an optionally substituted group selected from d.C ⁇ aliphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, aryld-C ⁇ alkyl, heteroaryld-C ⁇ alkyl, cycloaliphaticd-Cealkyl, or heterocycloaliphaticCi-Cealkyl.
  • R 4 groups are each independently Cl, Br, F, CF 3 , CH 3 , -CH 2 CH 3 , CN, -COOH, -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -CH 2 OH, -NHCOCH 3 , -SO 2 NH 2 , -SO 2 (CH 2 ) 3 CH 3 , -SO 2 CH(CH 3 ) 2 , - SO 2 N(CH 3 ) 2 , -SO 2 CH 2 CH 3 , -C(O)OCH 2 CH(CH 3 ) 2 , -C(O)NHCH 2 CH(CH 3 ) 2 , -NHCOOCH 3 , - C(O)C(CH 3 ) 3 , -NHCOOCH 3 , - C(O)C(CH
  • R 3 is halogen, CN, NO 2 , -N(R') 2 , -CH 2 N(R') 2 , -OR', - CH 2 OR ⁇ -SR', -CH 2 SR', -COOR', -NRCOR', -CON(R') 2 , -OCON(R') 2 , COR', - NHCOOR', -SO 2 R', -SO N(R') 2 , or an optionally substituted group selected from d- C 6 aliphatic, aryl, heteroaryl, cycloaliphatic, heterocycloaliphatic, aryld-C ⁇ alkyl, heteroaryld-C 6 alkyl, cycloaliphaticd-C 6 alkyl, or heterocycloaliphaticd-Cealkyl.
  • R 3 is Cl, Br, F, CF 3 , -OCF 3 , Me, Et, CN, -COOH, - NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , -O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -OCH 3 , - OCH 2 CH 3 , -CH 2 OH, -NHCOCH 3 , -NHCOCH(CH 3 ) 2 , -SO 2 NH 2 , -CONH(cyclopropyl), - CONHCH , -CONHCH 2 CH 3 , or an optionally substituted group selected from -piperidinyl, piperizinyl, morpholino, phenyl, phenyloxy, benzyl, or benzyloxy.
  • R 3 is halogen, CN, optionally substituted d-C 6 alkyl, OR', N(R') 2 , CON(R') 2 , or NRCOR'.
  • R 3 is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCHs, -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , - OCH 2 CH 3 , or -CN.
  • R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -CONHCH 3 , -CONHCH 2 CH 3 , - CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • R 3 is at the 7-position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , - CONHCH 3 , -CONHCH 2 CH 3 , -CONH(cyclopropyl), -OCH 3 , -NH 2 , -OCH 2 CH 3 , or -CN.
  • R 3 is at the 6-position of the quinazoline ring and is -Cl, -CH 3 , - CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or -OCH 2 CH 3 .
  • R 3 is at the 7- position of the quinazoline ring and is -Cl, -CH 3 , -CH 2 CH 3 , -F, -CF 3 , -OCF 3 , -OCH 3 , or - OCH 2 CH 3 .
  • R 3 is at the 6-position of the quinazoline ring and is - CON(R') 2 , or NRCOR'.
  • R 3 is at the 7-position of the quinazoline ring and is -CON(R') 2 , or NRCOR'.
  • R 5 and R 5a groups when present, are each independently halogen, CN, NO 2 , - N(R') 2 , -CH 2 N(R') 2 , -OR', -CH 2 OR', -SR', -CH 2 SR ⁇ - -NRCOR', -CON(R') 2 , -S(O) 2 N(R') 2 , -OCOR', -COR', -CO 2 R', -OCON(R') 2 , -NR'SO 2 R', -OP(O)(OR') 2 , -P(O)(OR') 2 , - OP(O) 2 OR', -P(O) 2 OR', -PO(R') 2 , -OPO(R') 2 , or an optionally substituted group selected from d.Ce
  • y is 0-5, and q is 1 or 2, and each occurrence of R 5a is independently Cl, Br, F, CF 3 , Me, Et, CN, -COOH, -NH 2 , -N(CH 3 ) 2 , -N(Et) 2 , -N(iPr) 2 , - O(CH 2 ) 2 OCH 3 , -CONH 2 , -COOCH 3 , -OH, -OCH 3 , -OCH 2 CH 3 , -CH 2 OH, -NHCOCH 3 , - SO 2 NH 2 , -SO 2 NHC(CH 3 ) 2 , -OCOC(CH 3 ) 3 , -OCOCH 2 C(CH 3 ) 3 , -O(CH 2 ) 2 N(CH 3 ) 2 , 4-CH 3 - piperazin-1-yl, OCOCH(CH 3 ) 2 , OCO(cycl
  • y is 0, and R 5a is F. In yet other embodimentsy is 0, q is 1, and R 5a is OR'. In still other embodiments, y is 0, q is 1 and R 5a is OH. In yet other embodiments, y is 1, R 5a is OR' and R 5 is F, wherein OR' is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring. In yet other embodiments, y is 1, R 5a is OH and R 5 is F, wherein OH is substituted at the 2-position of the phenyl ring and F is substituted at the 6-position of the phenyl ring.
  • compounds are useful as inhibitors of ion channels, preferably voltage gated sodium channels and N-type calcium channels.
  • compounds of the invention are useful as inhibitors of NaV1.8.
  • compounds of the invention are useful as inhibitors of NaVl.8 and CaV2.2.
  • compounds of the invention are useful as inhibitors of CaV2.2.
  • compounds of the invention are useful as dual inhibitors of NaV1.8 and a TTX-sensitive ion channel such as NaV1.3 or NaV1.7.
  • the compounds of this invention may be prepared in general by methods known to those skilled in the art for analogous compounds, as illustrated by the general scheme below, and the preparative examples that follow.
  • Scheme A depicts general conditions for the synthesis of compounds of formula IA where X is NR 2 .
  • the useful intermediate iii can be obtained by condensing a benzoylchloride with an anthranilamide.
  • step a Reaction of i and ii (step a) using K 2 CO 3 and ether under reflux conditions, and subsequent treatment with 5% aq. NaOH under reflux conditions yields intermediate iii.
  • Reaction of intermediate iii with POCl 3 to generate the 4-chloro compound, and subsequent reaction with i) N,N-dimethylaniline in benzene under reflux conditions; ii) BBr 3 , CH 2 C1 2 , -78 °C; and iii) R 1 R 2 NH, in THF/CH 2 C1 2 at room temperature yields the desired product IA.
  • Scheme B depicts an alternative synthesis for compounds of formula IA:

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DE602004024873T DE602004024873D1 (de) 2003-03-03 2004-03-03 Chinazolin-verbindungen als ionenkanal modulatoren
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NZ542664A NZ542664A (en) 2003-03-03 2004-03-03 Quinazolines useful as inhibitors of voltage-gated sodium channels and calcium channels
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CA002517844A CA2517844A1 (en) 2003-03-03 2004-03-03 Quinazolines useful as modulators of ion channels
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AU2004217891A AU2004217891B2 (en) 2003-03-03 2004-03-03 Quinazolines useful as modulators of ion channels
BR0408026-2A BRPI0408026A (pt) 2003-03-03 2004-03-03 Quinazolinas úteis como moduladores de canais de ìon
CN200480011981.4A CN1784391B (zh) 2003-03-03 2004-03-03 可用作离子通道调控剂的喹唑啉
EP04716887A EP1608632B1 (en) 2003-03-03 2004-03-03 Quinazolines useful as modulators of ion channels
IL170636A IL170636A (en) 2003-03-03 2005-09-04 Quinazoline derivatives and pharmaceutical compositions containing the same
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EP1608632B1 (en) 2009-12-30
IL170636A (en) 2012-08-30
AR044502A1 (es) 2005-09-14
US20110021495A1 (en) 2011-01-27
PE20041059A1 (es) 2005-02-07
CA2517844A1 (en) 2004-09-16
NO20054546D0 (no) 2005-10-03
EP1608632A1 (en) 2005-12-28
ATE453629T1 (de) 2010-01-15
US7678802B2 (en) 2010-03-16
RU2005130486A (ru) 2006-05-10

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