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RAF Inhibitors and Uses Thereof

a technology of raf and inhibitors, applied in the field of raf inhibitors, can solve problems such as uncontrolled tumor cell growth, and achieve the effect of inhibiting b-raf activity

Inactive Publication Date: 2009-05-28
ARQULE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This mutation increases the basal kinase activity of B-RAF, resulting in the activation of the MEK and ERK proteins that ultimately leads to uncontrolled tumor cell growth.

Method used

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  • RAF Inhibitors and Uses Thereof
  • RAF Inhibitors and Uses Thereof
  • RAF Inhibitors and Uses Thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of 3-{5-[2-({(3R)-1-[(4-chlorophenyl)sulfonyl]piperidin-3yl}amino)pyrimidin-4-yl]imidazo[2,1-b][1,3]thiazol-6-yl}phenol

1a: Preparation of 6-(3-methoxyphenyl)-imidazo[2,1-b]thiazole

[0164]

[0165]To a mixture of 2-aminothiazole (2.7 g, 26.7 mmol) and 2-bromo-3′-methoxyacetophenone (6.0 g, 0.0262 mol) was added absolute ethanol (100 ml). The reaction was allowed to reflux with vigorous stirring for 18 hours (checked by HPLC). The reaction mixture was reduced to half its original volume in vacuo. The remaining liquid was poured onto ice and the solution made basic by the addition of ammonium hydroxide solution (30%). The resulting fine solid was filtered and washed with water resulting in a dark yellow solid product. The solid product was dried in a vacuum oven at 50° C. to provide 6-(3-methoxyphenyl)-imidazo[2,1-b]thiazole (5.0 g, 81%). 400 MHz 1H NMR (DMSO-d6) δ 8.18 (s, 1H), 7.88 (d, J=4.4 Hz, 1H), 7.36-7.42 (m, 2H), 7.28 (t, J=8.1 Hz, 1H), 7.22 (d, J=4.4 Hz, 1H), 6.82 (ddd...

example 2

Preparation of 2-amino-oxazole

[0180]

[0181]To a solution of cyanamide (19.8 ml of 50% w / w in water, 0.25 mol) in THF (60 ml) was added the hydroxyacetaldehyde (15 g, 0.25 mol) in 24 ml of water. The reaction mixture was treated at 0° C. with a solution of sodium hydroxide 2 M (25.2 ml, 0.05 mol). The mixture was allowed to warm to room temperature and stirred for 24 hrs. The volatiles were removed in vacuo (THF) and the remaining aqueous solution was extracted with four portions of 200 ml of ethyl acetate. The organic extracts were dried over sodium sulfate and concentrated in vacuo, yielding 14.968 g (71.3%) of a white solid. 400 MHz 1H NMR (CDCl3) δ: 7.13 (s, 1H), 6.74 (s, 1H), 5.26 (br. s, 2H). Calc. for C3H4N2O: C, 42.86; H, 4.80; N, 33.32. found C, 43.01; H, 4.87; N, 33.11.

example 3

Preparation of N-[4-(dimethylamino)phenyl]-4-({4-[6-(4-fluorophenyl)-imidazo[2,1-b][1,3]oxazol-5-yl]pyrimidin-2-yl}amino)piperidine-1-carboxamide

3a: Preparation of 1-(4-fluorophenyl)-2-(2-imino-1,3-oxazol-3(2H)-yl)ethanone hydrobromide

[0182]

[0183]A solution of 2-amino-oxazole (14.9 g, 0.179 mol) in acetonitrile (100 ml) was slowly added over a period of 20 minutes to a solution of 2-bromo-1-(4-fluorophenyl)ethanone (57.6 g, 0.36 mol) in THF (150 ml). The reaction mixture was stirred at room temperature for 24 hrs then cooled to 0° C. A precipitate formed and was filtered off. The solid was washed with three portions of 30 ml of cold acetonitrile and dried at 50° C. under vacuum, yielding 38.75 g (72%) of an off-white solid. M.p.=218-221° C.; 300 MHz 1H NMR (DMSO-d6) δ: 9.80 (br. s, 1H), 8.16-8.11 (m, 2H), 8.00 (s, 1H), 7.62 (s, 1H), 7.52-7.46 (m, 2H), 5.80 (s, 2H); LCMS: 221 [M+H]. Calc. for C, 1H9N2O2F 1.05 HBr, 0.14 ACN: C, 43.58; H, 3.39; N, 9.64. found C, 43.63; H, 3.38; N, 9.65...

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Abstract

The present invention provides imidazooxazole and imidazothiazole compounds and their synthesis. The compounds of the present invention are capable of inhibiting the activity of RAF kinase, such as B-RAFV600E. The compounds are useful for the treatment of cell proliferative disorders such as cancer.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of U.S. Provisional Application No. 60 / 792,314, filed Apr. 17, 2006, the contents of which are incorporated herein by reference in their entirety.BACKGROUND OF THE INVENTION[0002]There are three RAF isoforms in humans: A-RAF, B-RAF and C-RAF (Marais and Marshall. Cancer Surv. 27:101-125 (1996)). These serine / threonine protein kinases are components of a conserved signaling pathway downstream of the membrane-bound small G protein RAS, which is activated by growth factors, hormones, and cytokines (Robinson and Cobb, Curr. Opin. Cell Biol. 9:180-186 (1997)). RAS stimulates RAF activation, which then leads to activation of the MEK kinase and subsequently the ERK kinase. Depending on the cellular context, this pathway mediates diverse biological functions such as cell growth, survival and differentiation predominantly through the regulation of transcription, metabolism and cytoskeletal rearrangements.[0003]Th...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K39/395C07D513/04A61K31/506A61K31/5377C07D498/04A61P35/00
CPCC07D513/04A61P35/00A61P43/00
Inventor LAPIERRE, JEAN-MARCNAMDEV, NIVEDITA D.ASHWELL, MARK A.FRANCE, DENNIS S.WU, HUIHUTCHINS, PATRICK M.TANDON, MANISHLIU, YANBINLINK, JEFF S.ALI, SYED M.BRASSARD, CHRIS J.NICEWONGER, ROBB B.FILIKOV, ANTONCARAZZA, REBECCA J.
Owner ARQULE INC
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