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Definitions

• the present invention relates to compounds that modulate the activity of liver X receptors.
• Atherosclerosis is the leading cause of death in the developed world.
• LXRs Liver X receptors
• RCT reverse cholesterol transport
• LXRa LXRa expression is tissue-selective, detectable in liver, intestine, kidney, adipose tissue and adrenal glands, all of which are important for lipid homeostasis, whereas LXRP is expressed ubiquitously.
• LXRs require the retinoid X receptor (RXR) as an obligate heterodimer partner to recognize and bind cooperatively to LXR response elements (LXREs) consisting of two direct repeats of a core hexameric sequence spaced by four nucleotides (DR4).
• RXR retinoid X receptor
• LXREs LXR response elements
• LXRs The ligand binding domains of the two LXRs are fairly well conserved (- 78% amino acid homology) and respond to endogenous ligands consisting of oxidized derivatives of cholesterol (oxysterols) that serve as intermediates in steroid hormone and bile acid synthesis. Among them, 22(R)-hydroxycholesterol, 24(S)-hydroxycholesterol, and 24(S), 25-epoxycholesterol are the most potent. These data suggested that LXRs are likely to play an important role in cholesterol regulation, which was later confirmed through gene knock-out studies in mice. Non-steroidal ligands have also been identified, and, using these as chemical probes many LXR-regulated genes have been discovered.
• liver X receptors have recently emerged as unprecedented targets acting as intracellular cholesterol sensors, providing the basis for the treatment of a variety of diseases, including atherosclerosis, diabetes, Alzheimer's disease, skin disorders, reproductive disorders and cancer (Viennois et al., 2011, Expert Opin. Ther. Targets, 15(2):219-232).
• LXR agonists modulate intestinal and renal sodium phosphate (NaPi) transporters and, in turn, serum phosphate levels (Caldas et al., 2011, Kidney International, 80:535-544).
• CaPi renal sodium phosphate
• serum phosphate levels (Caldas et al., 2011, Kidney International, 80:535-544).
• LXR is also a target for kidney disorders, and particularly for the prevention of hyperphosphatemia and associated cardiovascular complications.
• LXRs have been identified as targets in the treatment of osteoporosis and related diseases (Kleyer et al., 2012, J. Bone Miner. Res., 27(12):2442-51).
• Alzheimer's disease is one of the most common forms of dementia, characterized by the accumulation and deposition of amyloid-beta ( ⁇ ) peptides in the brain, leading to the perturbation of synaptic function and neuronal loss in the brains of affected individuals.
• Neurons in the brain produce ⁇ peptides via cleavage of amyloid precursor protein (APP), and ⁇ peptides are normally cleared through efflux into the peripheral circulation and by degradation by proteinases within the brain.
• APP amyloid precursor protein
• Apolipoprotein E is associated with age-related risk for Alzheimer's disease and plays critical roles in ⁇ homeostasis.
• LXR increases the expression of apoE and increases the lipidation of apoE. Degradation of ⁇ both intra- and extracellularly is enhanced by lipidated apoE.
• LXR agonist treatment stimulated proteolytic degradation of ⁇ , reduced plaque pathology, and improved memory in APP-expressing transgenic mice (Jiang et al, 2008, Neuron, 58:681-693).
• keratinocytes are a critical component of the epidermis.
• the outer layer, stratum corneum, is primarily responsible for the permeability barrier to water and electrolyte transit.
• Keratinocytes in the epidermis undergo differentiation which culminates in keratinocyte cornification ("the bricks") and in formation of the extracellular lipid-enriched lamellar membranes ("the mortar") in the stratum corneum.
• Both LXRa and LXR ⁇ are expressed in keratinocytes, and LXR expression and activation promotes epidermis barrier function.
• Activation of LXR is involved in keratinocyte differentiation, formation of the lamellar membrane and overall improvement of epidermal barrier function.
• LXR activation is expected to result in increased keratinocyte differentiation, increased lipid secretion (via ABCA1, ABCA12), and increased lamellar body formation, leading to a healthy epidermis (smooth skin).
• LXR agonists have led to the development of several high affinity LXR ligands with potent agonism for both receptor subtypes.
• the therapeutic utility of LXR agonists is constrained by their potential to induce lipogenic genes including sterol response element binding protein- lc (SREBPlc) and fatty acid synthase (FAS).
• SREBPlc sterol response element binding protein- lc
• FOS fatty acid synthase
• the present invention provides compounds that are liver X receptor agonists and are useful as therapeutic agents for the promotion of reverse cholesterol transport and the suppression of hepatic lipogenesis, and for the prevention, amelioration or treatment of diseases or disorders including atherosclerosis, Alzheimer's disease, dermatitis, and dyslipidemia in a patient.
• LXR modulators that are useful as therapeutic agents for the promotion of reverse cholesterol transport and the suppression of hepatic lipogenesis, and for the prevention, amelioration or treatment of diseases or disorders including atherosclerosis and dyslipidemia in a subject.
• the disclosed LXR modulators are selective for the LXRP subtype over the LXRa subtype (see e.g., Example 6, isomer 1 ; Example 7, isomer 1 ; and Example 13, isomer 1).
• One embodiment of the invention is a com ound represented by structural formula I:
• X is N or CR C .
• R 1 is alkyl or -NR a R b .
• R 2 is H; halogen; -CN; -NRC(0)R; -C(0)OR; -C(0)NR a R b ; monocyclic
• R is alkyl, haloalkyl, hydroxyalkyl, alkoxyalkyl, cycloalkyl, monocyclic non- aromatic heterocycle, monocyclic heteroaromatic or phenyl, wherein the phenyl, monocyclic non-aromatic heterocycle and monocyclic heteroaromatic group represented by R are optionally substituted with one or more groups selected from alkyl, halogen, haloalkyl, alkoxy, haloalkoxy, nitro and -CN.
• R 4 and R 5 independently are is halogen, -CN, -OR, -SR, -N(R) 2 , -C(0)R, -C(0)OR, -OC(0)0(alkyl), -C(0)0(haloalkyl), -OC(0)R, -C(0)N(R) 2 , -OC(0)N(R) 2 , -NRC(0)R, -NRC(0)0(alkyl), -S(0)R, -S0 2 R, -S0 2 N(R) 2 , -NRS(0)R, -NRS0 2 R, -NRC(0)N(R) 2 , -NRS0 2 N(R) 2 , haloalkyl, haloalkoxy, cycloalkoxy, cycloalkyl, monocyclic non-aromatic heterocycle, monocyclic heteroaromatic or alkyl, wherein the alkyl, monocyclic non-aromatic heterocycle and monocyclic heteroaromatic
• R 6 is H, halogen, -CN, -OR, -SR, -N(R) 2 , -C(0)R, -C(0)OR, -OC(0)0(alkyl), -C(0)0(haloalkyl), -OC(0)R, -C(0)N(R) 2 , -OC(0)N(R) 2 , -NRC(0)R, -NRC(0)0(alkyl), -S(0)R, -S0 2 R, -S0 2 N(R) 2 , -NRS(0)R, -NRS0 2 R, -NRC(0)N(R) 2 , -NRS0 2 N(R) 2 , haloalkyl, haloalkoxy, cycloalkoxy, cycloalkyl or alkyl, wherein the alkyl group represented by R 6 is optionally substituted with one or more groups selected from
• Each R independently is H or alkyl.
• R a and R b are independently H, alkyl or R a and R b can be taken together with the nitrogen to which they are attached to form a monocyclic non-aromatic heterocycle.
• R c is H, alkyl, or halogen.
• Another aspect of the invention is a pharmaceutical composition
• a pharmaceutical composition comprising a compound of the invention and a pharmaceutically acceptable carrier or diluent.
• a further aspect of the present invention also provides for a method of treating a subject with a disease or disorder that is treatable by upregulating LXR activity.
• the method comprises administering an effective amount of a compound of the invention or a
• Also provided in the invention is the use of a compound of the invention for the manufacture of a medicament for treating a subject with a disease or disorder that is treatable by upregulating LXR activity in a subject in need thereof.
• Disclosed herein is also a compound of the invention for use in treating a disease or disorder that is treatable by upregulating LXR activity in a subject in need thereof.
• X is N or CR C .
• R 10 is alkyl or -NR a R b .
• R 20 is H; halogen; -CN; -NRC(0)R; -C(0)OR; -C(0)NR a R b ; monocyclic
• R 30 is alkyl, haloalkyl, hydroxyalkyl, alkoxyalkyl, cycloalkyl or phenyl, wherein the phenyl group represented by R 30 is optionally substituted with one or more groups selected from alkyl, halogen, haloalkyl, alkoxy, haloalkoxy, nitro and -CN.
• Each R independently is H or alkyl.
• R a and R b are independently H, alkyl or R a and R b can be taken together with the nitrogen to which they are attached to form a monocyclic non-aromatic heterocycle.
• R c is H, alkyl, or halogen.
• the compound(s) of the invention provided herein include both the neutral form and a pharmaceutically acceptable salt thereof.
• the compound is represented by structural formula II, III, IV, V, VI, or VII or a pharmaceutically acceptable salt thereof wherein the values for the variables are as defined for Formula I above.
• R is alkyl, haloalkyl, hydroxyalkyl, alkoxyalkyl, cycloalkyl, or phenyl, wherein the phenyl group represented by R is optionally substituted with one or more groups selected from alkyl, halogen, haloalkyl, alkoxy, haloalkoxy, nitro and -CN;
• R 4 and R 5 independently are halogen, -CN, -OR, -SR, -N(R) 2 , -C(0)R, -C(0)OR, -OC(0)0(alkyl), - C(0)0(haloalkyl), -OC(0)R, -C(0)N(R) 2 , -OC(0)N(R) 2 , -NRC(0)R, -NRC(0)0(alkyl), -S(0)R, -S0 2 R, -S0 2 N(R) 2 , -NRS(0)R, -NRS0 2 R, -NRC(0)N(R) 2 , -NRS02N(R) 2 , haloalkyl, haloalkoxy, cycloalkoxy, cycloalkyl or alkyl, wherein the alkyl represented by R 4 or R 5 is optionally substituted with one or more groups selected from -CN, -OR, -SR, -N(R) 2 ,
• R 6 is H, halogen, -CN, -OR, -SR, -N(R) 2 , -C(0)R, -C(0)OR, -OC(0)0(alkyl), -C(0)0(haloalkyl), -OC(0)R, -C(0)N(R) 2 , -OC(0)N(R) 2 , -NRC(0)R,
• -NRC(0)0(alkyl), -S(0)R, -S0 2 R, -S0 2 N(R) 2 , -NRS(0)R, -NRS0 2 R, -NRC(0)N(R) 2 , -NRS0 2 N(R) 2 , haloalkyl, haloalkoxy, cycloalkoxy, cycloalkyl or alkyl, wherein the alkyl group represented by R 6 is optionally substituted with one or more groups selected from -CN, -OR, -SR, -N(R) 2 , 0, -C(0)R, -C(0)OR, -C(0)0(haloalkyl), -OC(0)R,
• R 1 is methyl or -NH 2 .
• R 2 is H or -CH 2 OH.
• R is methyl, ethyl, propyl, isopropyl, iert-butyl, sec-butyl, isobutyl, -CH 2 CF 3 , -CH(CH 2 F) 2 , -CH(CHF 2 ) 2 , -CH(CF 3 ) 2 , -CF(CH 3 ) 2 , -CF 3 , cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, -C(OH)(CH ) 2 , -CH(OH)(CH ), or phenyl, wherein the phenyl group represented by R is optionally substituted with one or more groups selected from alkyl, halogen, haloalkyl, alkoxy, haloalkoxy, nitro and -CN.
• R c where present, is H.
• R 1 is methyl; R 2 is -CH 2 OH; and R 3 is isopropyl.
• the values for the remaining variables are as defined for Formula I or for the first or second alternative embodiment.
• R 4 and R 5 independently are halogen, hydroxy, alkyl, cycloalkyl, cycloalkoxy, alkoxy, haloalkoxy, haloalkyl, -N(R) 2 , -C(0)OH, -C(0)0(alkyl), -C(0)0(haloalkyl), -C(0)(alkyl), -C(0)N(R) 2 , -NRC(0)R, -S0 2 N(R) 2 , -OC(0)N(R) 2 , -CN, hydroxyalkyl or dihydroxyalkyl.
• the values for the remaining variables are as defined for Formula I or for the first, second or third alternative embodiments.
• R 4 is alkyl, haloalkyl, cycloalkyl, alkoxy, or haloalkoxy.
• the values for the remaining variables are as defined for Formula I or for the first, second, third or fourth alternative embodiments.
• R 4 and R 5 independently are methyl, ethyl, hydroxy, -CF , isopropyl, cyclopropyl, -CH 2 OH, -CH(OH)(CH 2 )(OH), -C(OH)(CH 3 ) 2 , -CH(OH)(CH 3 ), -CH(OH)(CH 2 )(CH 3 ),
• R 4 is as just described and R 5 is -C(OH)(CH ) 2 .
• the values for the remaining variables are as defined for Formula I or for the first , second, third, fourth or fifth alternative embodiments.
• R 4 is methyl, halogenated methyl, cyclopropyl, -OCHF 2 or -OCH .
• R 4 is CF .
• the values for the remaining variables are as defined for Formula I or for the first, second, third, fourth, fifth or six alternative embodiments.
• Another embodiment of the invention is a compound represented by formulas I, II, III, IV, V, VI or VII or a pharmaceutically acceptable salt thereof, wherein the variables are as defined for formula I or in the first, second, third, fourth, fifth, sixth or seventh alternative embodiments, provided that the compound comprises at least one group represented by - C(0)OR.
• Another embodiment of the invention is a compound represented by formula I, II, III, IV V, VI or VII or a pharmaceutically acceptable salt thereof, wherein the variables are as defined for formula (I) or in the first, second, third, fourth, fifth, sixth or seventh alternative embodiment, provided that the compound comprises no groups represented by -C(0)OR.
• the compounds of the invention (or intermediate(s) used in their preparation) contain at least one chiral center and, therefore, exist as enantiomers.
• compounds of the invention are depicted or named without indicating the stereochemistry, it is to be understood that enantiomerically pure forms and mixtures of enantiomers, including racemic mixtures, are encompassed.
• a compound When a compound is designated by a name or structure that indicates a single enantiomer, unless indicated otherwise, the compound is at least 50%, 60%, 70%, 80%, 90%, 95%, 99%, 99.5% or 99.9% optically pure (also referred to as "enantiomerically pure").
• Optical purity is the weight in the mixture of the named or depicted enantiomer divided by the total weight in the mixture of both enantiomers.
• stereoisomeric purity is the weight in the mixture of the named or depicted stereoisomer(s) divided by the total weight in the mixture of all stereoisomers.
• a compound of the invention is depicted by a structural formula in Table 1 or a pharmaceutically acceptable salt thereof.
• a compound of the invention is selected from any one of compounds E6a, E7a, 13a, E18 and E27a or a pharmaceutically acceptable salt thereof. Table 1.
• an intermediate compound used in the preparation of the LXR modulators is represented by structural formula VIII, IX, or X or a salt thereof wherein the values for the variables are as defined for Formula la above.
• R 10 is -CH 3 .
• the values for the remaining variables are as defined for Formula la.
• R 20 is -CH 2 OH, -CH 2 0(protecting group), -COOH, or -C(0)0(alkyl).
• the values for the remaining variables are as defined for Formula la or in the first alternative
• R 30 is isopropyl.
• the values for the remaining variables are as defined for Formula la or the first or second alternative embodiment for formulas VIII through X.
• R 20 is -CH 2 0(TBDPS) or -C(0)OCH 3 .
• the values for the remaining variables are as defined for Formula la or for the first or third alternative embodiment of any compound of formulas VIII through X.
• an intermdiate compound is selected from
• the subject is a non-human animal such as a non-human primate (e.g., a monkey, chimpanzee), a farm animal (e.g. , a horse, cow, pig, chicken, or sheep), a laboratory animal (e.g. , a rat or mouse), or a companion animal (e.g., dog, cat, guinea pig or rabbit).
• a non-human primate e.g., a monkey, chimpanzee
• a farm animal e.g. , a horse, cow, pig, chicken, or sheep
• a laboratory animal e.g. , a rat or mouse
• a companion animal e.g., dog, cat, guinea pig or rabbit.
• the subject is a human.
• Compound(s) of the invention refers to compounds represented by Structural Formula I, II, III, IV, V, VI, VII; a compound depicted in Table 1 ; a compound named or depicted in the examples herein as the final compound(s) of the example; or a
• Compound(s) of the invention also includes the neutral form of the compounds as depicted herein.
• “Pharmaceutically acceptable” refers to a component that is, within the scope of sound medical judgment, suitable for use in contact with the tissues of the subject, such as humans and other mammals, without undue toxicity, irritation, allergic response and the like, and are commensurate with a reasonable benefit/risk ratio.
• Suitable pharmaceutically acceptable acid addition salts of the compounds of the invention include salts of inorganic acids (such as hydrochloric acid, hydrobromic, phosphoric, metaphosphoric, nitric, and sulfuric acids) and of organic acids (such as, acetic acid, benzenesulfonic, benzoic, citric, ethanesulfonic, fumaric, gluconic, glycolic, isethionic, lactic, lactobionic, maleic, malic, methanesulfonic, succinic, p- toluenesulfonic, and tartaric acids).
• Compounds of the invention with acidic groups such as carboxylic acids can form
• Suitable pharmaceutically acceptable salts with pharmaceutically acceptable base(s) include ammonium salts, alkali metal salts (such as sodium and potassium salts) and alkaline earth metal salts (such as magnesium and calcium salts). Lists of suitable salts are found in Remington's Pharmaceutical Sciences, 18th ed., Mack Publishing Company, Easton, PA, 1990, p 1445, the disclosure of which is hereby incorporated by reference.
• Liver X receptors or LXRs includes both the a and ⁇ subtypes of the liver X receptor.
• the disclosed compounds selectively bind and upregulate the activity of the LXRP subtype over the LXRa subtype.
• modulate a receptor means that there is a change or alteration in the activity of a molecule of interest, e.g., the biological activity of liver X receptor. Modulation may be an upregulation (increase) or a
• the compounds of the invention are LXR agonists that, for example, upregulate or downregulate genes which are transcriptional targets of LXR (i.e., "LXR target genes").
• Treat” or “treating” include both therapeutic and prophylactic treatments and mean to ameliorate, decrease, suppress, attenuate, diminish, arrest, or stabilize the development or progression of a disease (e.g., a disease or disorder delineated herein), lessen the severity of the disease or improve the symptoms associated with the disease.
• a disease e.g., a disease or disorder delineated herein
• Disease or “disorder” means any condition that is modulated or otherwise affected by LXR activity or in which LXR activity is implicated.
• the diseases or disorders include those which are associated with, or symptoms arising from the complications of, altered cholesterol transport, cholesterol reverse transport, fatty acid metabolism, cholesterol absorption, cholesterol re-absorption, cholesterol secretion, cholesterol excretion, or cholesterol metabolism.
• Effective amount is the quantity of the compound which is sufficient to treat (therapeutically or prophylactically) the target disorder or in which a beneficial clinical outcome is achieved when the compound is administered to a subject in a proper dosing regimen. Effective doses will also vary, as recognized by one of ordinary skill in the art, depending on the disease being treated, the severity of the disease, the route of
• an effective amount is sufficient to reduce or ameliorate the severity, duration or progression of the disorder being treated, prevent the advancement of the disorder being treated, cause the regression of the disorder being treated, or enhance or improve the prophylactic or therapeutic effect(s) of another therapy.
• a "beneficial clinical outcome" includes a reduction in tumor mass, a reduction in metastasis, a reduction in the severity of the symptoms associated with the cancer and/or an increase in the longevity of the subject compared with the absence of the treatment.
• a "beneficial clinical outcome” includes reduction in the severity or number of symptoms associated with the disorder, lower cholesterol, or increase in the longevity of the subject compared with the absence of the treatment.
• the recommended dosages of agents currently used for the treatment of a disorder can be obtained from various references in the art including, but not limited to, Hardman et ah, eds., 1996, Goodman & Gilman's The Pharmacological Basis Of Basis Of Therapeutics 9 th Ed, Mc-Graw-Hill, New York; Physician's Desk Reference (PDR) 57 th Ed., 2003, Medical Economics Co., Inc., Montvale, NJ, each of which are incorporated herein by reference in its entirety.
• an effective amount of a compound of this invention is in the range of from 0.5 mg to 2000 mg, or from 0.5 mg to 1000 mg, or from 0.5 mg to 500 mg, or from 0.5 mg to 100 mg, or from 100 mg to 1000 mg, or from 20 mg to 2000 mg per treatment. Treatment typically is administered from one to three times daily.
• Halo or "halogen” means chloro, bromo, fluoro, or iodo. In one embodiment, halo is fluoro.
• Alkyl means a straight or branched hydrocarbon group having 1 to 15 carbon atoms in the chain. In one embodiment, alkyl groups have 1 to 12 carbon atoms in the chain. In another embodiment, alkyl groups have 1 to 6 carbon atoms. Exemplary alkyl groups include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, ie/t-butyl, sec- butyl, n-pentyl, 3-pentyl, heptyl, octyl, nonyl, decyl, and dodecyl.
• Alkoxy is an alkyl group which is attached to another moiety via an oxygen linker (-O(alkyl)).
• oxygen linker -O(alkyl)
• Non-limiting examples include methoxy, ethoxy, propoxy, and butoxy.
• Haloalkyl or “halogenated alkyl” means an alkyl group in which one or more, including all, of the hydrogen radicals are replaced by a halo group, wherein each halo group is independently selected from -F, -CI, -Br, and -I.
• halomethyl or “halogenated methyl” means a methyl in which one to three hydrogen radical(s) have been replaced by a halo group.
• Representative haloalkyl groups include fluoromethyl,
• difluoromethyl trifluoromethyl, bromomethyl, 1,2-dichloroethyl, 4-iodobutyl, 2-fluoropentyl, and the like.
• Other examples include groups such as but are not limited to -CH 2 CF 3 , - CH(CH 2 F) 2 , -CH(CHF 2 ) 2 , -CH(CF 3 ) 2 , -CF(CH 3 ) 2 , -CF 3 .
• Haloalkoxy is a haloalkyl group which is attached to another moiety via an oxygen linker such as but are not limited to -OCHCF 2 or -OCF .
• Alkoxyalkyl is an alkoxy group which is attached to another moiety via an alkyl linker.
• Hydroalkyl or “dihydroxyalkyl” is one or two hydroxy groups, respectively, which are attached to another moiety via an alkyl linker.
• Representative "hydroxyalkyl” or “dihydroxyalkyl” include -CH 2 OH, -CH(OH)(CH 2 )(OH), -C(OH)(CH 3 ) 2 , -CH(OH)(CH 3 ), -CH(OH)(CH 2 )(CH 3 ), -CH(OH)(CH 2 ) 2 (CH 3 ), -C(CH 3 ) 2 (OH), and the like.
• Cycloalkyl means a non-aromatic monocyclic ring system of 3 to 10 carbon atoms. In one embodiment, the cycloalkyl group has 3 to 6 carbon atoms. Exemplary cycloalkyl rings include cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl.
• Cycloalkoxy means a cycloalkyl group which is attached to another moiety via an oxygen linker (-O(cycloalkyl)).
• “Monocyclic non-aromatic heterocycle” means a single saturated heterocyclic ring, typically having 3- to 10-members and more typically 3 to 7-members in the ring, wherein at least one atom in the ring is a heteroatom such as, for example, nitrogen, oxygen, sulfur, including sulfoxide and sulfone.
• a 3- to 4-membered monocyclic non-aromatic heterocycle can contain up to 2 heteroatoms; a 5-6 membered monocyclic heterocycle can contain up to 3 heteroatoms and a 7- to 10-membered monocyclic non-aromatic heterocycle can contain up to 4 heteroatoms.
• the monocyclic non-aromatic heterocycle may be attached to another group via any heteroatom or carbon atom of the monocyclic non-aromatic heterocycle.
• Representative monocyclic non-aromatic heterocycles include morpholinyl, thiomorpholinyl, pyrrolidinonyl, pyrrolidinyl, piperidinyl, piperazinyl, imidazolidinyl, pyrazolidinyl, oxazolidinyl, isothiazolidinyl, hydantoinyl, valerolactamyl, oxiranyl, oxetanyl,
• a monocyclic non-aromatic heterocycle is a heterocyclic ring of 4, 5, 6, or 7 members.
• “Monocyclic heteroaromatic” comprises carbon atom ring members and one or more heteroatom ring members. Each heteroatom is independently selected from nitrogen, oxygen, and sulfur, including sulfoxide and sulfone. The point of attachment of a monocyclic heteroaromatic ring to another group may be at either a carbon atom or a heteroatom of the heteroaromatic. In one embodiment, the monocyclic heteroaromatic ring is selected from 5 to 8 membered monocyclic heteroaromatic rings.
• Representative monocyclic heteroaromatic groups include pyridyl, 1-oxo-pyridyl, furanyl, thienyl, pyrrolyl, oxazolyl, imidazolyl, thiazolyl, isoxazolyl, pyrazolyl, isothiazolyl, pyridazinyl, pyrimidinyl, pyrazinyl, a triazinyl, triazolyl, thiadiazolyl, and tetrazolyl.
• a protecting group is a group which is bonded to a reactive functional group in a compound to convert the reactive functional group to another, non-reactive group to allow, for example, reaction(s) at another part of the molecule without interference from the reactive functional group. Once the reaction(s) at the other part of the molecule have been completed, the protecting groups is removed to regenerate the original reactive functional group.
• Protecting groups for an hydroxy group (-OH) and reactions and conditions for protecting and deprotecting the hydroxy group are well known in the art and are disclosed, for example, in Greene and Wuts, "Protective Groups in Organic Synthesis", John Wiley & Sons (2007), Chapter 2 and references cited therein.
• a protecting group may protect a hydroxy group as an ether.
• Such protecting groups include, but are not limited to methyl, methoxymethyl, methylthiomethyl, (phenyldimethylsilyl)methoxymethyl, benzyloxymethyl, p-methoxybenzyloxymethyl, [3,4-dimethoxybenzyl)oxy]methyl, p-nitrobenzyloxymethyl, o- nitrobenzyloxymethyl, [(R)-l-(2-nitrophenyl)ethoxy]methyl, (4-methoxyphenoxy)methyl, guaiacolmethyl, [(p-phenylphenyl)oxy]methyl, t-butoxymethyl, 4-pentenyloxymethyl, siloxymethyl, 2-methoxyethoxymethyl, 2-cyanoethoxymethyl, bis(2-chloroethoxy)methyl, 2,2,2-trichloroethoxymethyl, 2-(trimethylsilyl)ethoxymethyl, menthoxymethyl, 0-bis(2- acetoxyethoxy)methyl, tetrahydropyranyl, flu
• suitable protecting groups protect the hydroxy group as esters, for example, formate, benzoylformate, acetate, chloroacetate, dichloroacetate, trichloroacetate, trichloroacetamidate, trifluoroacetate, methoxyacetate, triphenylmethoxyacetate,
• a pharmaceutical composition comprising a compound of the invention and a pharmaceutically acceptable carrier or diluent.
• the compound of the invention is present in an effective amount.
• the interrelationship of dosages for animals and humans is described in Freireich et al., Cancer Chemother. Rep, 1966, 50: 219.
• Body surface area may be determined approximately from height and weight of the patient. See, e.g., Scientific Tables, Geigy Pharmaceuticals, Ardsley, N.Y., 1970, 537.
• the LXR modulators herein can be formulated as pharmaceutical compositions and administered to a subject, such as a human, in a variety of forms adapted to the chosen route of administration.
• Typical routes of administering such pharmaceutical compositions include, without limitation, oral, topical, buccal, transdermal, inhalation, parenteral, sublingual, rectal, vaginal, and intranasal.
• parenteral as used herein includes subcutaneous injections, intravenous, intramuscular, intrathecal, intrasternal injection or infusion techniques.
• compositions of the invention can be prepared by combining a compound of the invention with an appropriate pharmaceutically acceptable carrier, diluent or excipient, and may be formulated into preparations in solid, semi-solid, liquid or gaseous forms, such as tablets, capsules, powders, granules, ointments, solutions, suppositories, injections, inhalants, gels, microspheres, and aerosols.
• an appropriate pharmaceutically acceptable carrier such as tablets, capsules, powders, granules, ointments, solutions, suppositories, injections, inhalants, gels, microspheres, and aerosols.
• the present compounds may be systemically administered, e.g., orally, in combination with a pharmaceutically acceptable excipient such as an inert diluent or an assimilable edible carrier.
• the active compound may be combined with one or more excipients and used in the form of ingestible tablets, buccal tablets, troches, capsules, elixirs, suspensions, syrups, wafers, and the like.
• Suitable tablets may be obtained, for example, by mixing one or more compounds of the invention with known excipients, for example inert diluents, carriers, disintegrants, adjuvants, surfactants, binders and/or lubricants.
• excipients for example inert diluents, carriers, disintegrants, adjuvants, surfactants, binders and/or lubricants.
• the tablets may also consist of several layers.
• the compounds of the invention can be suitably formulated into pharmaceutical compositions for administration to a subject.
• the pharmaceutical compositions of the invention optionally include one or more pharmaceutically acceptable carriers and/or diluents therefor, such as lactose, starch, cellulose and dextrose.
• Other excipients such as flavoring agents; sweeteners; and preservatives, such as methyl, ethyl, propyl and butyl parabens, can also be included. More complete listings of suitable excipients can be found in the Handbook of Pharmaceutical Excipients (5th Ed., Pharmaceutical Press (2005)). A person skilled in the art would know how to prepare formulations suitable for various types of administration routes.
• a compound of the invention may be incorporated with excipient and used in the form of ingestible tablets, buccal tablets, troches, capsules, elixirs, suspensions, syrups, wafers, and the like.
• solutions of a compound of the invention can generally be prepared in water suitably mixed with a surfactant such as
• Dispersions can also be prepared in glycerol, liquid polyethylene glycols, DMSO and mixtures thereof with or without alcohol, and in oils. Under ordinary conditions of storage and use, these preparations contain a preservative to prevent the growth of microorganisms.
• sterile aqueous solutions or dispersion of, and sterile powders of, a compound of the invention for the extemporaneous preparation of sterile injectable solutions or dispersions.
• the compounds of the invention can be formulated as aerosols, drops, gels and powders.
• Aerosol formulations typically comprise a solution or fine suspension of the active substance in a physiologically acceptable aqueous or non-aqueous solvent and are usually presented in single or multidose quantities in sterile form in a sealed container, which can take the form of a cartridge or refill for use with an atomizing device.
• the sealed container may be a unitary dispensing device such as a single dose nasal inhaler or an aerosol dispenser fitted with a metering valve which is intended for disposal after use.
• the dosage form comprises an aerosol dispenser, it will contain a propellant which can be a compressed gas such as compressed air or an organic propellant such as fluorochlorohydrocarbon.
• the aerosol dosage forms can also take the form of a pump-atomizer.
• the compounds of the invention can be formulated with a carrier such as sugar, acacia, tragacanth, or gelatin and glycerine, as tablets, lozenges or pastilles.
• a carrier such as sugar, acacia, tragacanth, or gelatin and glycerine, as tablets, lozenges or pastilles.
• the compounds of the invention can be formulated in the form of suppositories containing a conventional suppository base such as cocoa butter.
• Topical and/or local administration of the compounds of the invention can be achieved in a variety of ways including but not limited to ointments, lotions, pastes, creams, gels, powders, drops, sprays, solutions, inhalants, patches, suppositories, retention enemas, chewable or suckable tablets or pellets and aerosols. Topical and/or local administration may also involve the use of transdermal administration such as transdermal patches or iontophoresis devices.
• the compounds of the invention can be formulated as ointments, creams, milks, salves, powders, impregnated pads, syndets, solutions, gels, sprays, foams, suspensions, lotions, sticks, shampoos or washing bases.
• Compounds of the invention may also be administered in the form of suspensions of lipid or polymer vesicles or nanospheres or microspheres or polymer patches and hydrogels for controlled release.
• LXR is modulated by upregulating LXR activity.
• the method comprises administering an effective amount of the compound of the invention.
• a compound of the invention for the manufacture of a medicament for treating a subject with a disease or disorder that is treatable by upregulating LXR activity in a subject in need thereof.
• the methods provided herein may be useful for disorders treatable with LXR modulation, in particular LXR agonism.
• diseases or disorders include, but are not limited to, a lipid disorder; cancer, particularly hormone-dependent cancers, including ovarian, breast and prostate cancer; acneiform skin condition; skin inflammatory disease; immunological disorder; condition characterized by a perturbed epidermal barrier function; condition of disturbed differentiation or excess proliferation of the epidermis or mucous membrane; cardiovascular disease; reproductive tract disorders; optic nerve and retinal pathology; degenerative neuropathy occurring in a disease; autoimmune disease; traumatic damage to the central or peripheral nervous system; neurodegenerative disease; or a degenerative process due to aging; diseases or disorders of the kidney; and osteoporosis and related diseases.
• the disease or disorder is hyperlipidemia
• hypercholesterolemia hyperlipoproteinemia, hypertriglyceridemia, lipodystrophy, hepatic steatosis, nonalcoholic steatohepatitis (NASH), nonalcoholic fatty liver disease (NAFLD), hyperglycemia, insulin resistance, diabetes mellitus, dyslipidemia, atherosclerosis, gallstone disease, acne vulgaris, dermatitis (including but not limited to, psoriasis, contact dermatitis, atopic dermatitis, and eczema), skin wounds, skin aging, photoaging, wrinkling, diabetes, Niemann-Pick disease type C, Parkinson's disease, Alzheimer's disease, inflammation, xanthoma, obesity, metabolic syndrome, syndrome X, stroke, peripheral occlusive disease, memory loss, diabetic neuropathies, proteinuria, glomerulopathies (including but not limited to, diabetic nephropathy, hypertensive nephropathy, IGA nephropathy, focal segmental glomerul
• the disease or disorder is common acne; comedones;
• keratoacanthomas immune dermatitides, including but not limited to lupus erythematosus; bullous immune diseases; collagen diseases, including but not limited to scleroderma;
• dermatological or systemic conditions or afflictions with an immunological component skin disorders due to exposure to UV radiation; photo-induced or chronological aging of the skin; actinic pigmentations; keratosis; pathology associated with chronological or actinic aging, including but not limited to xerosis; sebaceous function disorders, including but not limited to hyperseborrhoea of acne, simple seborrhoea and seborrhoeic dermatitis; cicatrization disorders, including but not limited to stretch marks; pigmentation disorders, including but not limited to hyperpigmentation, melasma, hypopigmentation, and vitiligo; and alopecia, including but not limited to chemotherapy-associated alopecia and radiation-associated alopecia.
• the disease or disorder is hypercholesterolemia, atherosclerosis or dyslipidemia. In another embodiment, the disease or disorder is atherosclerosis or dyslipidemia. In yet another embodiment, the disease or disorder is atherosclerosis, Alzheimer's disease or dermatitis.
• the present invention also provides a method for increasing reverse cholesterol transport and/or for inhibiting the progression of or promoting the regression of
• the present invention also provides a method of treating diseases or disorders associated with a need for increasing high density lipoprotein (HDL)-cholesterol levels comprising the administration of an effective amount of a compound of the invention to a mammal (particularly a human) in need thereof.
• HDL high density lipoprotein
• the present invention also provides a method of treating a disease or disorder associated with a need for decreasing low density lipoprotein (LDL)-cholesterol levels comprising the administration of an effective amount of a compound of the invention to a mammal (particularly a human) in need thereof.
• LDL low density lipoprotein
• ATP- Binding Cassette protein in a subject's cells, thereby increasing reverse cholesterol transport in a subject using the compounds of the invention and compositions provided herein.
• Standard physiological, pharmacological and biochemical procedures are known to the art and are available for evaluating compounds of the present invention for the ability to modulate LXR activity.
• Such assays include, for example, binding assays, fluorescence polarization assays, FRET based co-activator recruitment assays, and cell-based co- transfection assays.
• Compounds of the present invention can be evaluated for their ability to modulate the expression of genes known to be modulated by LXR.
• Established animal models can be used to study the profiles of compounds of the present invention in relation to parameters directly relevant to diseases or disorders, including atherosclerosis, Alzheimer's disease, and skin conditions.
• compounds of the present invention can be tested in vivo in animal models by a variety of routes of administration, for example, oral gavage.
• in vivo compound exposure can be examined in plasma and in tissues of interest.
• LXR activity (as detected by gene expression of LXR-responsive genes) can be examined in whole blood and tissues of interest. Lipids can be quantified in the plasma and the liver.
• compounds of the present invention can be tested for their activity on ATP-Binding Cassette (ABC) cholesterol transporters, such as ABCA1 and ABCG1, and on lipogenic markers, such as SREBPlc at the gene and protein expression level.
• ABC ATP-Binding Cassette
• SREBPlc lipogenic markers
• Lipogenic markers can be examined in animal models by measuring plasma and liver triglyceride levels.
• the compounds of the present invention can be used alone (i.e., as a monotherapy) or in combination with one or more other therapeutic agent effective for treating any of the above indications.
• the pharmaceutical compositions can comprise the disclosed compounds alone as the only pharmaceutically active agent or can comprise one or more additional pharmaceutically active agents.
• the present invention also provides combination therapy for treating or ameliorating a disease or a disorder described herein.
• the combination therapy comprises administering at least one compound represented by Structural Formula I, II, III, IV, V, or VI in combination with one or more agents for treating or ameliorating a disease or a disorder described herein.
• the combination therapy comprises administering at least one compound represented by Structural Formula I, II, III, IV, V, or VI in combination with one or more agents for the treatment of diseases including
• hyperlipidemia hypercholesterolemia, hyperlipoproteinemia, hypertriglyceridemia, lipodystrophy, hepatic steatosis, NASH, NAFLD, hyperglycemia, insulin resistance, diabetes mellitus, dyslipidemia, atherosclerosis, gallstone disease, acne vulgaris, dermatitis (including but not limited to, psoriasis, contact dermatitis, atopic dermatitis, and eczema), skin wounds, skin aging, photoaging, wrinkling, diabetes, Niemann-Pick disease type C, Parkinson's disease, Alzheimer's disease, inflammation, xanthoma, obesity, metabolic syndrome, syndrome X, stroke, peripheral occlusive disease, memory loss, diabetic neuropathies, proteinuria, glomerulopathies (including but not limited to, diabetic nephropathy,
• hypertensive nephropathy IGA nephropathy, focal segmental glomerulosclerosis
• hyperphosphatemia associated cardiovascular complications of hyperphosphatemia, cancer, multiple sclerosis or osteoporosis.
• the compounds of the invention are used in combination with one or more additional agents for the treatment of diabetes, dyslipidemia, cardiovascular disease, hypertension, or obesity.
• Agents for the treatment of diabetes include insulins, such as Humulin ® (Eli Lilly), Lantus ® (Sanofi Aventis), Novolin ® (Novo Nordisk), and Exubera ® (Pfizer); PPAR gamma agonists, such as Avandia ® (rosiglitizone maleate, GSK) and Actos ® (pioglitazone hydrochloride, Takeda/Eli Lilly); sulfonylureas, such as Amaryl (glimepiride, Sanofi Aventis), Diabeta ® (glyburide, Sanofi Aventis), Micronase ® /Glynase ® (glyburide, Pfizer), and Glucotrol ® /Glucotrol XL ® and (glip
• Prandin®/NovoNorm ® (repaglinide, Novo Nordisk), Starlix ® (nateglinide, Novartis), and Glufast ® (mitiglinide, Takeda); biguanides, such as Glucophage ® /Glucophage XR ®
• metalformin HC1, Bristol Myers Squibb and Glumetza ® (metformin HC1 extended release tablets, Depomed); thiazolidinediones; amylin analogs, GLP-1 analogs or agonists (including Byetta ® (exenatide, Amylin/Eli Lilly) and Victoza ® (recombinant liraglutide, Novo
• DPP-IV inhibitors including TradjentaTM (Eli Lilly/Boehringer Ingelheim), Januvia ® (Merck), Galvus ® (Novartis), and Onglyza ® (Bristol-Myers Squibb/AstraZeneca); PTB- 1 B inhibitors; protein kinase inhibitors (including AMP-activated protein kinase inhibitors); glucagon antagonists, glycogen synthase kinase-3 beta inhibitors; glucose-6- phoshatase inhibitors; glycogen phosphorylase inhibitors; sodium glucose co-transporter inhibitors, and alpha-glucosidase inhibitors, such as Precose ® /Glucobay ® /Prandase ® /Glucor ® (acarbose, Bayer) and Glyset ® (miglitol, Pfizer).
• TradjentaTM Eli Lilly/Boehringer Ingelheim
• Agents for the treatment of dyslipidemia and cardiovascular disease include statins, fibrates, and ezetimbe.
• Agents for the treatment of hypertension include alpha-blockers, beta-blockers, calcium channel blockers, diuretics, angiotensin converting enzyme (ACE) inhibitors, dual ACE and neutral endopeptidase (NEP) inhibitors, angiotensin-receptor blockers (ARBs), aldosterone synthase inhibitors, aldosterone-receptor antagonists, or endothelin receptor antagonists.
• Agents for the treatment of obesity include orlistat, phentermine, sibutramine and rimonabant.
• Avandamet ® metalformin HC1 and rosiglitazone maleate, GSK
• Avandaryl ® glimepiride and rosiglitazone maleate, GSK
• Metaglip ® glipizide and metformin HC1, Bristol Myers Squibb
• Glucovance ® glyburide and metformin HC1, Bristol Myers Squibb
• the combination therapy comprises administering at least one compound of the invention in combination with one or more compound selected from the group of, for example, beta secretase (BACE1) inhibitors; gamma- secretase inhibitors;
• BACE1 beta secretase
• gamma- secretase inhibitors gamma- secretase inhibitors
• amyloid aggregation inhibitors e.g. , ELND-005
• directly or indirectly acting amyloid aggregation inhibitors e.g. , ELND-005
• neuroprotective and/or disease-modifying substances include anti-oxidants (e.g. , vitamin E or ginkolide); anti-inflammatory substances (e.g. , Cox inhibitors, NSAIDs); HMG-CoA reductase inhibitors (statins); acetylcholinesterase inhibitors (e.g. , donepezil, rivastigmine, tacrine, galantamine, memantine; tacrine); NMDA receptor antagonists (e.g., memantine); AMPA receptor agonists; AMPA receptor positive modulators, AMPAkines, monoamine receptor reuptake inhibitors, substances modulating the concentration or release of neurotransmitters; substances inducing the secretion of growth hormone (e.g.
• CB-1 receptor antagonists or inverse agonists antibiotics (e.g. , minocyclin or rifampicin); PDE2, PDE4, PDE5, PDE9, PDE10 inhibitors, GABAA receptor inverse agonists, GABAA receptor antagonists, nicotinic receptor agonists or partial agonists or positive modulators, alpha4beta2 nicotinic receptor agonists or partial agonists or positive modulators, alpha7 nicotinic receptor agonists or partial agonists or positive modulators; histamine H3 antagonists, 5 HT-4 agonists or partial agonists, 5HT-6 antagonists, alpha2- adrenoreceptor antagonists, calcium antagonists, muscarinic receptor Ml agonists or partial agonists or positive modulators, muscarinic receptor M2 antagonists, muscarinic receptor M4 antagonists, metabotropic glutamate-re
• Combination therapy includes co-administration of a compound of the invention and one or more other agent, sequential administration of a compound of the invention and one or more other agent, administration of a composition containing a compound of the invention and one or more other agent, or simultaneous administration of separate compositions containing a compound of the invention and one or more other agent.
• the compounds of the present invention can be readily prepared according to the following reaction schemes and examples, or modifications thereof, using readily available starting materials, reagents and conventional synthesis procedures. Many of the reactions can also be carried out under microwave conditions or using conventional heating or utilizing other technologies such as solid phase reagents/scavengers or flow chemistry. In these reactions, it is also possible to make use of variants which are themselves known to those of ordinary skill in this art, but are not mentioned in greater detail. Furthermore, other methods for preparing compounds of the invention will be readily apparent to a person of ordinary skill in the art in light of the following reaction schemes and examples.
• reagents in the reaction schemes are used in equimolar amounts; however, in certain cases it may be desirable to use an excess of one reagent to drive a reaction to completion. This is especially the case when the excess reagent can be readily removed by evaporation or extraction.
• Bases employed to neutralize HC1 in reaction mixtures are generally used in slight to substantial excess (1.05 - 5 equivalents).
• HPLC System Waters ACQUITY; Column: Waters ACQUITY CSHTM CI 8 1.7 ⁇ Guard column: Waters Assy. Frit, 0.2 ⁇ , 2.1 mm; Column tern: 40 °C
• Mass Spectrometer Waters SQD; Ionization: Positive Electrospray Ionization (ESI); Mode Scan (100-1400 m/z in every 0.2 second); ES Capillary Voltage: 3.5 kv; ES Cone Voltage: 25 v Source Temperature : 120 °C; Disolvation Temperature: 500 °C; Desolvation Gas Flow: Nitrogen Setting 650 (L/hr); Cone Gas Flow: Nitrogen Setting 50 (L/hr)
• the chiral purity of compounds of the invention was determined by analytical chiral HPLC, which was carried out using Chiralcel ® or Chiralpak ® columns, using C0 2 , together with from 5% to 40% methanol, ethanol or isopropanol, containing 0.05% DEA, as eluents.
• a compound of Formula I can be prepared by 8 ⁇ or palladium catalyzed reactions of reagents 1, where G 1 is CI, Br, I, OTf or OTs, with intermediates of Formula 2.
• Reagents 1 are either commercially available or can be prepared readily from commercially available precursors based on literature precedents.
• intermediates of Formula 2 can be prepared by cyclization of intermediates of Formula 3a followed by removal of G 2 when G 2 is not hydrogen.
• G 2 is an amine protecting group, such as Boc, Cbz and trifluoroacetamide, etc.
• Intermediates of Formula 3a can be prepared by one of the two methods: 1) copper mediated coupling of piperazinone 4a and aniline 5a, where G 3 is Br, I, CI or OTf; 2) S Ar reaction between 4a and fluorinated nitrobenzene 6a to give intermediate of Formula 7a followed by reduction of the nitro group.
• the intermediate 7a can also be prepared from an intermediate of Formula 8a by displacement of fluorine with either sodium alkanesulfinate (R SC ⁇ Na) or sodium alkylsulfide (R ⁇ SNa) followed by oxidation of the resulting thioether.
• the intermediate 8a in turn can be prepared from piperazinone 4a and difluoro nitrobenzene 9a, which are either commercially available or can be readily prepared from commercial precursors based on literature procedures, well known to those of ordinary skill in the art.
• piperazinone 4a can be prepared by one of the methods presented below.
• G 2 are amine protecting groups, such as Boc, Cbz and trifluoroacetamide etc.
• Intermediates of Formula 3b can be prepared by N-alkylation of indole 4b with commercially available alkyl halide 5b, where G 3 is Br or I.
• Intermediates of Formula 4b can be prepared by removal of G 4 from intermediates of Formula 6b, where G 4 is
• Intermediates of Formula 6b can be prepared by sequential Sonogashira coupling reaction between aryl halides 7b (where G 5 is Br or I) and propargyl alcohols 8b, followed by cyclization, to give intermediates of Formula 9b, followed by oxidation of the alcohol.
• Intermediates of Formula 7b can be prepared from commercially available aniline 10b via the following transformations: 1) Displacement of fluorine with sodium alkyl sulfide R x SNa (yielding lib); 2) Halogenation (yielding 12b); 3) Protection of the aniline (yielding 13b); 4) Oxidation of the sulfide (yielding 7b).
• Intermediate lc in turn can be prepared from coupling of reagents 1 and intermediates of Formula 2c via S Ar or palladium catalyzed reactions.
• Intermediates 2c can be prepared according to following scheme.
• Step 6 To a solution of l-(l-(2-aminoethyl)-6-(methylthio)-lH-indol-2-yl)-2-methylpropan- 1-one (200 mg, 0.724 mmol) in MeOH (5 mL) was added Et 3 N (219.3 mg, 2.172 mmol). The reaction mixture was stirred at 60 °C for 1 h. Then NaBH 4 (82.53 mg, 2.172 mmol) was added to the formed mixture. The mixture was stirred at 60 °C for another 1 h. The mixture was concentrated, treated with water (10 mL) and extracted with EtOAc (20 mL X 3).
• the reaction mixture was diluted with CH 2 CI 2 (40 mL) and washed with 3 ⁇ 40 (50 mL). The organic layer was separated, and the aqueous layer was extracted with CH 2 CI 2 (4 x 50 mL). The combined organic solution was washed with brine, dried over anhydrous Na 2 S0 4 , filtered and concentrated under reduced pressure.
• Step 9 A solution of 8-(((tert-butyldiphenylsilyl)oxy)methyl)- l-isopropyl-7- (methylsulfonyl)-3,4-dihydropyrazino[l,2-a]indole (140 mg, 0.25 mmol), 10% Palladium on charcoal (37 mg, 0.025 mmol) and methanol (5 mL) was stirred at rt under 1 atmosphere of hydrogen for 3 h. The mixture was filtered through Celite ® and the Celite ® was washed thoroughly with methanol.
• Method 2 To a solution of l,l,l-trifluoropentane-2,4-dione (200 g, 1.30 mol) in ethanol (200 mL) were added urea (78 g, 1.30 mol) and CH(OEt) 3 (211.5 g, 1.43 mol). The mixture was stirred at 80 °C for 4h. The resulting slurry was filtered. The filter cake was suspended in methanol (300 mL) and MeONa (77.2 g, 1.43 mol) was added. The mixture was stirred at reflux for 5h, followed by slow addition of HC1 (4N) to pH 3 at rt.
• the title compound was prepared using a modified procedure based on Ondi, L. et al., Eur. J. Org. Chem. 2
• a mixture of 4-(trifluoromethyl)pyrimidin-2-ol (6.05g, 36.9mmol), KOAc (10.85g, 3eq.), acetic acid (80mL), and bromine (5.9g, leq.) was heated for 2h at 80 °C. After being cooled to rt, the mixture was concentrated. The residue was partitioned between EtOAc and water. The aqueous layer was extracted with EtOAc (2x). The combined organic layers were washed with brine, dried over Na 2 S0 4 . After filtration and concentration, the crude white solid product (9.38g, quant, yield) was used for next steps without further purification.
• racemic mixture was purified by SFC separation to give (R)-2-(2-(8-(hydroxymethyl)- l-isopropyl-7- (methylsulfonyl)-3,4-dihydrobenzo[4,5]imidazo[l,2-a]pyrazin-2(lH)-yl)-4- (trifluoromethyl)pyrimidin-5-yl)propan-2-ol (16.20 mg, isomer 1) and (S)-2-(2-(8- (hydroxymethyl)-l-isopropyl-7-(methylsulfonyl)-3,4-dihydrobenzo[4,5]imidazo[l,2- a]pyrazin-2(lH)-yl)-4-(trifluoromethyl)pyrimidin-5-yl)propan-2-ol (9.10 mg, isomer 2) as white solids.
• Isomer 1 can be recrystallized as a hydrochloric acid salt according to following procedure:
• the racemic mixture was purified by SFC separation to give isomer 1 (10.60 mg, 47.1% yield) as a white solid, isomer 2 (7.10 mg, 31.6% yield) as a white solid, isomer 3 (4.70 mg, 26.1% yield) as a white solid and isomer 4 (6.00 mg, 33.3% yield) as a white solid.
• MeMgCl (0.3 mL, 0.9 mmol, 3M) was added to the formed mixture and then the reaction mixture was stirred at 0 °C for 1 h. The reaction was quenched with sat. NH 4 C1 (5 mL) at 0 °C and then extracted with EtOAc (30 mL X 3).
• dichloromethane (1 mL) was added DIBAL-H (0.25 mg, 0.25 mmol, 1M in toluene) at -78 °C under nitrogen. The reaction mixture was stirred at -78 °C for 1 h. The reaction was quenched with sat. NH 4 C1 (5 mL) at -78 °C and then extracted with dichloromethane (30 mL X 3).
• LXR ligand binding domain LXR ligand binding domain
• SPA scintillation proximity assay
• Partially purified LXR a or ⁇ LBD protein (15-45 nM) was incubated at rt for 30 min with 15 nM [ H]TO901317 (25-40 Ci/mmol) and different concentrations of test compounds in 80 ⁇ ⁇ of phosphate buffered saline (PBS) buffer containing 2.5% DMSO, 1% glycerol, 2mM EDTA, 2mM CHAPS and 5mM DTT in 96- well plates.
• PBS phosphate buffered saline
• Poly-lysine SPA beads 50 ⁇ g were added to each well and the total volume was adjusted to 120 ⁇ ⁇ .
• the plates were shaken on an orbital shaker for 20 min and then allowed to settle for 10 more minutes at rt before a brief centrifugation at 2,000 rpm for 1 min.
• the SPA signal was measured on a MicroBeta ® liquid scintillation counter (Perkin Elmer, Waltham, MA), and the results were used for calculating IC50 values based on the total binding (DMSO control) and non-specific binding (5 ⁇ of unlabeled TO901317) controls.
• LXR Luciferase Transcriptional Reporter Gene Assay measures the ability of LXR ligands to promote transcriptional activation via the ligand binding domain (LBD) of LXR.
• LXR luciferase transcriptional reporter gene assay measures the ability of LXR ligands to promote transcriptional activation via the ligand binding domain (LBD) of LXR.
• HEK293 cells were grown in DMEM medium containing 10% FBS (Gibco ® , #11995-065) and lxPenStrep (Gibco ® , #15140) at 37°C in 5% C0 2 atmosphere. 90% confluent cells from a 150mm dish were seeded in six 100mm dishes.
• the cells were batch-transfected with an expression plasmid containing the Gal4 DNA binding domain fused to either the LBD of LXRa or LXRP and a luciferase reporter plasmid pG5-Luc (Promega, Madison, WI), which has Gal4 response elements upstream of firefly luciferase gene (luc+). Transfection was accomplished with LipofectamineTM 2000 (Gibco ® ) according to the manufacturer' s suggested protocol. Five hs following transfection, 15 mL of 10% charcoal-treated FBS (Hyclone, #SH30070.03) in DMEM were added to the transfected dishes without removing transfection media, and then incubate the cells at 37°C overnight.
• LipofectamineTM 2000 Gibco ®
• the cells from the transfected dish were trypsinized, washed with PBS, resuspended in 10% charcoal- treated DMEM media and plated into 96-well plates with 60,000 cells/100 ⁇ ⁇ per well.
• the cells were incubated at 37°C for ⁇ 4 h before addition of 100 ⁇ ⁇ of test compound or control ligand at different concentrations (final DMSO concentration at 0.2%).
• the culture media were dumped and Bright-GloTM luciferase reagent (Promega, Cat. #E2610) was added to lyse the cells and initiate the luciferase reaction.
• Luminescence as a measure of luciferase activity, was detected in a plate reader (Victor2, PE-Wallac). Transcriptional activation in the presence of a test substance was expressed as fold-change in luminescence compared to that of cells incubated in the absence of the substance. EC50 values were calculated using the XLfitTM program (IDBS, Guilford, UK).

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