Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
  • C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
  • C07D233/64—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms, e.g. histidine
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
  • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
  • A61K47/22—Heterocyclic compounds, e.g. ascorbic acid, tocopherol or pyrrolidones
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
  • C07D249/02—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms not condensed with other rings
  • C07D249/04—1,2,3-Triazoles; Hydrogenated 1,2,3-triazoles
  • C07D249/06—1,2,3-Triazoles; Hydrogenated 1,2,3-triazoles with aryl radicals directly attached to ring atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
  • C07D249/02—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms not condensed with other rings
  • C07D249/08—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D261/00—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings
  • C07D261/02—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings
  • C07D261/06—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings having two or more double bonds between ring members or between ring members and non-ring members
  • C07D261/08—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings having two or more double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
  • C07D263/02—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings
  • C07D263/30—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
  • C07D263/32—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D271/00—Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms
  • C07D271/02—Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms not condensed with other rings
  • C07D271/06—1,2,4-Oxadiazoles; Hydrogenated 1,2,4-oxadiazoles
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
  • C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
  • C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
  • C07D277/22—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
  • C07D277/24—Radicals substituted by oxygen atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D285/00—Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups C07D275/00 - C07D283/00
  • C07D285/01—Five-membered rings
  • C07D285/02—Thiadiazoles; Hydrogenated thiadiazoles
  • C07D285/04—Thiadiazoles; Hydrogenated thiadiazoles not condensed with other rings
  • C07D285/12—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
  • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
  • C07D409/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
  • C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
  • C07D413/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond

Definitions

• Oral delivery of many biologically or chemically active agents would be the route of choice for administration to animals if not for biological, chemical, and physical barriers such as varying pH in the gastrointestinal (GI) tract, powerful digestive enzymes, and active agent impermeable gastrointestinal membranes.
• GI gastrointestinal
• agents which are not typically amenable to oral administration are biologically or chemically active peptides, such as calcitonin and insulin; polysaccharides, and in particular mucopolysaccharides including, but not limited to, heparin; heparinoids; antibiotics; and other organic substances. These agents are rapidly rendered ineffective or are destroyed in the gastrointestinal tract by acid hydrolysis, enzymes, or the like.
• resorcinols and non-ionic surfactants such as polyoxyethylene oleyl ether and n-hexadecylpolyethylene ether
• enzyme inhibitors e.g., pancreatic trypsin inhibitors, diisopropylfluorophosphate
• Liposomes have also been described as drug delivery systems for insulin and heparin. See, for example, U.S. Pat. No. 4,239,754; Patel et al (1976), FEBS Letters, Vol 62, pg. 60, and Hashimoto et al. (1970), Endocrinology Japan, Vol, 26, pg. 337.
• microspheres of artificial polymers of mixed amino acids have been used to deliver pharmaceuticals.
• proteinoids mixed amino acids
• U.S. Pat. No. 4,925,673 describes drug-containing proteinoid microsphere carriers as well as methods for their preparation and use. These proteinoid microspheres are useful for the delivery of a number of active agents.
• Delivery agent molecules have also been disclosed in U.S. Pat. Nos. 5,541,155; 5,693,338; 5,976,569; 5,643,957; 5,955,503; 6,100,298; 5,650,386; 5,866,536; 5,965,121; 5,989,539; 6,001,347; 6,071,510; 5,820,881; and 6,242,495; see also WO 02/02509; WO 01/51454; WO 01/44199; WO 01/32130; WO 00/59863; WO 00/50386; WO 00/47188; and WO 00/40203.
• the present invention relates to a compound of formula I: wherein:
• R 1 and R 2 are each independently H, OH, cyano, C 1 -C 6 alkyl, C 1 -C 6 alkoxy, CF 3 , halo or NR 4 R 4 ;
• R 3 is H, C 1 -C 6 alkyl
• X is a 5 membered aromatic heterocycle that is optionally substituted with C 1 -C 4 alkyl; wherein said heterocycle contains at least two or three heteroatoms selected from N, S and O wherein at least one heteroatom must be N;
• Y is S, CR 5 ⁇ N or N ⁇ CR 5 ;
• n 2, 3, 4, 5, 6 or 7;
• R 4 is H, COR 6 , SO 2 R 7 , or C 1 -C 6 alkyl
• R 4 is H or C 1 -C 6 alkyl
• R 5 is H or forms a bond with X
• R 6 is H or C 1 -C 6 alkyl
• R 7 is H or C 1 -C 6 alkyl; or a pharmaceutical salt thereof.
• the present invention further relates to a compound of formula I wherein R 3 is H.
• This compound is hereafter referred to as a compound of formula II.
• the present invention also relates to a pharmaceutical composition containing a compound of formula II, or a pharmaceutical salt thereof, and a pharmaceutical carrier.
• the present invention also relates to a pharmaceutical composition containing a compound of formula II, or a pharmaceutical salt thereof, and a GLP-1 compound.
• the present invention also relates to a pharmaceutical composition containing a compound of formula II, or a pharmaceutical salt thereof, and a MC4 agonist peptide.
• halo refers to fluoro, chloro, bromo and iodo.
• C 1 -C 6 alkyl represents a straight, branched or cyclic hydrocarbon moiety having from one to six carbon atoms, e.g., methyl, ethyl, n-propyl, isopropyl, cyclopropyl, n-butyl, isobutyl, sec-butyl, t-butyl, cyclobutyl, pentyl, cyclopentyl, hexyl, cyclohexyl and the like.
• Moieties such as a cyclobutylmethylene are also included within the scope of a C 1 -C 6 alkyl group.
• C 1 -C 4 alkyl refers specifically to methyl, ethyl, n-propyl, isopropyl, cyclopropyl, cyclopropylmethyl, n-butyl, isobutyl, sec-butyl, t-butyl and cyclobutyl.
• a “C 1 -C 6 alkoxy” group is a C 1 -C 6 alkyl moiety connected through an oxy linkage.
• pharmaceutical when used herein as an adjective means substantially non-deleterious to the recipient patient.
• patient includes humans and non-human animals such as companion animals (dogs, cats, horses and the like).
• patient of treatment is a human.
• GLP-1 compound refers to one or more naturally occurring GLP-1 polypeptides (GLP-1(7-37)OH and GLP-1(7-36)NH 2 ), GLP-1 fragments, GLP-1 analogs, GLP-1 derivatives of naturally occurring GLP-1 polypeptides, GLP-1 fragments, or GLP-1 analogs, and Exendin-3 and Exendin-4 that have the ability to bind to the GLP-1 receptor and initiate a signal transduction pathway resulting in insulinotropic activity as described in PCT Publication Number WO 03/072195 (Application Number PCT/US03/03 111); herein incorporated by reference.
• MC4 agonist peptide refers to the pharmaceutically useful peptides disclosed in PCT Patent Application No. PCT/US04/16625, filed Jun. 17, 2004 (peptides of formula I, II and III as disclosed therein).
• the compound of formula II is useful for increasing the oral bioavailability of an active agent, i.e., a GLP-1 compound or an MC4 agonist peptide, when said compound is mixed with the active agent to form a combination composition. Said combination is one embodiment of the present invention.
• the compositions of the present invention comprise a compound of formula II, that is, a delivery agent (a formula II compound), and a GLP-1 compound or an MC4 agonist peptide.
• the present invention is particularly advantageous for delivering a GLP-1 compound or an MC4 agonist peptide (active agent) that would otherwise be destroyed or rendered less effective by conditions encountered before the active agent reaches its target zone (i.e. the area in which the active agent of the delivery composition is to be released) and within the body of the animal to which it is administered.
• the compositions comprising one or more compounds of formula II (preferably and most typically one) and an active agent have utility in the delivery of said active agent to selected biological systems and in an increased or improved bioavailability of the active agent compared to administration of the active agent without the delivery agent. Delivery can be improved by delivering more active agent over a period of time, or in delivering active agent in a particular time period (such as to effect quicker or delayed delivery) or over a period of time (such as sustained delivery).
• Certain compounds of the invention are particularly interesting and are preferred.
• the following listing sets out several groups of preferred compounds. It will be understood that each of the listings may be combined with other listings to create additional groups of preferred compounds.
• n 2, 3, 4 or 5;
• R 1 and R 2 are each independently H, OH, OCH 3 CH 3 , CF 3 , Cl, or Br;
• R 1 and R 2 are each independently H, OH, OCH 3 CH 3 or CF 3 ;
• R 1 and R 2 are each independently H, OH, OCH 3 or NH 2 ;
• R 1 is H and R 2 is OH;
• R 1 and R 2 are both H
• R 3 is H
• R 4 is H
• R 4 is COR 6 and R 6 is CH 3 ;
• R 4 is SO 2 R 7 and R 7 is CH 3 ;
• R 4 ′ is H
• R 7 is C 1 -C 6 alkyl
• X is and the aryl (pyridine or thiophene) substituent is attached at carbon atom number 4 and the alkanoic acid chain is attached at carbon atom number 2;
• X is and the aryl substituent is attached at carbon atom number 3 and the alkanoic acid is attached at carbon atom number 5.
• Flash column chromatography is carried out using Kieselgel silica gel 60.
• Proton NMR spectra are obtained on a Bruker AC 300 MHz Nuclear Magnetic Resonance Spectrometer and are reported in ppm ⁇ values, using tetramethylsilane as an internal reference. Melting points are obtained using an Electrothermal melting point apparatus and are uncorrected.
• CI Mass spectroscopic analyses are performed on a Shimadzu QP-5000 GC/Mass Spectrometer (methane) by direct injection.
• the elution system consisted of 90:10 (0.1% TFA in H 2 O)/(0.1% TFA in CH 3 CN) gradient elution to 10:90 (0.1% TFA in H 2 O)/(0.1% TFA in CH 3 CN) over 20 min, followed by 10:90 (0.1% TFA in H 2 O)/(0.1% TFA in CH 3 CN) isocratic elution for 10 min, followed by 90:10 (0.1% TFA in H 2 O)/(0.1% TFA in CH 3 CN) isocratic elution for 10 min.
• the flow rate is 1 mL/min. UV Detection is performed at both 214 and 254 nm.
• the compound of formula II may contain a basic and/or acidic moiety (i.e., amino and/or carboxylic acid), said compound may be formulated as a pharmaceutical salt, e.g., as the sodium or hydrochloride salt or as a salt described in “Handbook of Pharmaceutical Salts: Properties, Selection and Use”, Weinheim, N.Y.: VHCA; Wiley-VCH, 2002.
• the compound of formula II is preferably formulated in a dosage unit form, i.e., in an individual delivery vehicle, for example, a tablet or capsule, prior to administration to the recipient patient. Therefore, yet another embodiment of the present invention is a pharmaceutical composition comprising a compound of formula II, or a pharmaceutical salt thereof, an active agent, and a pharmaceutical carrier.
• the present pharmaceutical compositions are prepared by known procedures using well-known and readily available ingredients.
• the delivery agent (formula II compound) will be mixed with an active agent and will usually be mixed with a carrier, or diluted by a carrier, or enclosed within a carrier which may be in the form of a capsule, sachet, paper or other container.
• the carrier serves as a diluent, it may be a solid, semisolid or liquid material which acts as a vehicle, excipient or medium for the active ingredient.
• a pH range of 7.4 to 8.4 for each formulation is typically employed, whereas for a MC4 agonist peptide, a pH range of 6.8-7.2 (most typically 7.0) for the formulation of is typically utilized.
• a target delivery agent concentration of 150 mg/mL in both cases is also typical.
• aqueous soluble aqueous soluble
• nearly completely soluble e.g., few undissolved particles remaining, very fine aqueous suspensions or hazy suspensions
• aqueous insoluble e.g., heavy suspensions
• Delivery agents that exhibited aqueous insolubility are formulated in 4% w/v (aqueous) hydroxypropylcellulose (Klucel® LF, Hercules, Wilmington, Del.) as needed. In these cases, between 50 and 100 mg of agent is suspended in Klucel® LF in a Type I glass vial, to yield a concentration of 200 mg/mL.
• Klucel® LF 4% w/v hydroxypropylcellulose
• the preparations are cooled on ice for 3 minutes, followed by probe sonication on ice for 30 minutes using a Misonix Sonicator® Ultrasonic Processor XL ( 3/16 th inch microtip) to reduce particle size. Following pH adjustment with NaOH or HCl, the formulations are then diluted to 150 mg/mL with MilliQ water or Klucel® LF.
• the GLP-1 compounds e,g., Val 8 -Glu 22 -GLP-1(7-37)OH and Val 8 -Glu 22 -I 33 -GLP-1(7-37)OH
• MC4 agonist peptides e.g., Ac-Arg-cyclo[Cys-Glu-His-D-Phe-Arg-Trp-Cys]-NH 2 ; Ac-cyclo[hCys-His-D-Phe-Arg-Trp-Cys]-NH 2 ; Ac-cyclo[hCys-His-D-Phe-Arg-Trp-penicillamine]-NH 2 ; and N-cyclohexanecarbonyl-cyclo[hCys-His-D-Phe-Arg-Trp-penicillamine]-NH 2 ) used herein are described in PCT Publication Number WO 03/072195 and PCT Patent Application No. PCT/US04/16625, filed June 17, respectively.
• a stock solution of GLP-1 compound active agent is prepared as follows. Briefly, a known quantity of lyophilized active agent is weighed into a Type I glass vial. MilliQ water is then added to yield an initial concentration of about 7-10 mg/mL. Complete solubility of the peptide is achieved by slowly raising the pH of the medium to 10.5 with 1 N NaOH and 5 N NaOH, followed by incubation at room temperature for 30 minutes. A volume of 1 M Tris buffer, pH 8.0 is added to give a final buffer concentration of 20 mM Tris, and the pH adjusted to pH 7.8 with 1N HCl and 5 N HCl. The solution is then filtered through a low protein binding 0.22 ⁇ M syringe filter (Millex GV, Millipore).
• the solution is then diluted to a stock concentration of about 5.0 mg/mL using 20 mM Tris buffer, pH 7.8.
• the active agent solution is stored in 1.0 mL aliquots at ⁇ 70° C. until used.
• mice Male Sprague-Dawley (femoral artery cannulated, Charles River, Wilmington, Mass.) rats weighing 250-300 g are used in these studies. Animals are housed in single house stainless steel cages and cared for according to Eli Lilly and Company Animal Care and Use Policies & Procedures. Animals are fasted for at least 12 hours (with free access to water) before dose administration. Each experiment (delivery agent+active agent) is conducted in a group of four rats. Final formulations for each delivery agent are freshly prepared approximately 5-10 minutes prior to in vivo dosing.
• delivery agent formulation ⁇ 165 mg/mL stock
• GLP-1 compound active agent solution ⁇ 5.0 mg/mL stock
• the final concentrations in each such formulation are 150 mg/mL and 0.5 mg/mL, respectively.
• Formulations are dosed by oral gavage (PO) for a final dose of 300 mg/kg delivery agent and 1.0 mg/kg active agent.
• One mL of blood samples is collected in EDTA tubes from the systemic (femoral artery) cannula from each animal (one sample/time point) at 5, 10, and 20 minutes. Tubes are chilled on ice immediately following collection and centrifuged at approximately 5° C./3,000 rpm/15 minutes. Plasma is removed, transferred into 12 ⁇ 75 mm polypropylene sample tubes with snap caps, and stored immediately at ⁇ 70° C. until analyzed by a radioimmunoassay.
• delivery agent formulation ⁇ 165 mg/mL stock
• peptide solution ⁇ 20.0 mg/mL stock
• the final concentrations in each such formulation are 150 mg/mL and 5.0 mg/mL, respectively.
• Formulations are dosed by oral gavage (PO) for a final dose of 300 mg/kg delivery agent and 10.0 mg/kg active agent.
• 0.40 mL of blood sample is collected in heparin tubes from the systemic (femoral artery) cannula from each animal (one sample/time point) at, 5, 15, 30, 60, 90 and 120 minutes. Tubes are chilled on ice immediately following collection and centrifuged at approximately 5° C./3,000 rpm/15 minutes. Plasma is removed, transferred into 96 well plates and stored immediately at ⁇ 70 C until analyzed by a LC/MS/MS.
• Concentrations of immunoreactive active agent in rat plasma are assayed by a radioimmunoassay assay that non-specifically detects native peptide and metabolic products. These concentrations are subsequently used to determine the reported pharmacokinetic parameters.
• Plasma samples are mixed with radiolabeled active agent and rabbit polyclonal antiserum and then incubated overnight at ⁇ 4° C. Bound and free forms of immunoreactive active agent are separated by precipitating the bound fraction by polyethylene glycol-assisted, secondary antibody precipitation. After collecting the bound fraction by centrifugation, the radioactivity is measured by a gamma counter. Data is analyzed by a weighted 4/5 parameter logistic algorithm.
• the standard curve ranges from 9.8 pg/mL to 10000 pg/mL and the upper and lower quantification limits are 150 pg/mL and 4000 pg/mL, respectively.
• the standard curve ranges from 5.0 ng/mL to 5000 ng/mL and the upper and lower quantification limits are 10 ng/mL and 5000 ng/mL, respectively.
• Pharmacokinetic analysis is performed using WinNonlinTM Version 3.0 (Pharsight Corporation, Mountain View, Calif.). Plasma concentration time data are reported as mean ⁇ standard deviation (SD).
• Delivery agent efficiency is defined as area under the plasma concentration-time curve measured from 0 to 20 min (AUC) of active agent in the presence of each delivery agent.
• Representative compounds of formula II (delivery agent) are tested with an active agent in the Rat Oral Delivery assay and the AUC of active agent in the presence of delivery agent is greater than the AUC of the active agent in the absence of the delivery agent.

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• 2004
  • 2004-08-18 US US10/566,012 patent/US20070293423A1/en not_active Abandoned
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