2-Aminothiazole → 3-cyclopentyl-N-thiazol-2-yl-2-(4-trifluoromethoxy-phenyl)-propionamide

HRID 430358

Reaktionsgleichung

[CH:1]1([CH2:6][CH:7]([C:11]2[CH:16]=[CH:15][C:14]([O:17][C:18]([F:21])([F:20])[F:19])=[CH:13][CH:12]=2)[C:8]([OH:10])=O)[CH2:5][CH2:4][CH2:3][CH2:2]1.C(Cl)(=O)C(Cl)=O.[NH2:28][C:29]1[S:30][CH:31]=[CH:32][N:33]=1.C(N(CC)C(C)C)(C)C>C(Cl)Cl.CN(C)C=O.O1CCCC1>[CH:1]1([CH2:6][CH:7]([C:11]2[CH:16]=[CH:15][C:14]([O:17][C:18]([F:21])([F:20])[F:19])=[CH:13][CH:12]=2)[C:8]([NH:28][C:29]2[S:30][CH:31]=[CH:32][N:33]=2)=[O:10])[CH2:2][CH2:3][CH2:4][CH2:5]1

Komponenten

Reaktionsbedingungen

Temperatur: 25 °C

Versuchsvorschrift

A solution of 3-cyclopentyl-2-(4-trifluoromethoxy-phenyl)-propionic acid (0.16 g, 0.52 mmol) in methylene chloride (5.3 mL) cooled to 0° C. was treated with a 2.0M solution of oxalyl chloride in methylene chloride (0.29 mL, 0.58 mmol) and a few drops of N,N-dimethylformamide. The reaction mixture was stirred at 0° C. for 10 min and at 25° C. for 30 min. The reaction mixture was then treated with a solution of 2-aminothiazole (0.11 g, 1.16 mmol) and N,N-diisopropylethylamine (0.22 mL, 1.27 mmol) in tetrahydrofuran (2.65 mL). The reaction mixture was stirred at 25° C. for 18 h. At this time, the reaction was concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 230-400 mesh 80/20 hexanes/ethyl acetate) afforded 3-cyclopentyl-N-thiazol-2-yl-2-(4-trifluoromethoxy-phenyl)-propionamide (203.8 mg, 100%) as a white solid: mp 168-170° C.; EI-HRMS m/e calcd for C18H19F3N2O2S (M+) 384.1119, found 384.1118.

Aufarbeitung

stirringThe reaction mixture was stirred at 25° C. for 18 h
concentrationAt this time, the reaction was concentrated in vacuo

Quellen und Nachweise

ORD-Eintrag: ord-054f7035ae964522b17d6ffe364bf7d2
Quelldatensatz: uspto-grants-2001_11
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US06320050B1

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