4-Methyl-2-(4-trifluoromethyl-phenyl)-thiazole-5-carboxylic acid ethyl ester → (4-Methyl-2-(4-(trifluoromethyl)phenyl)-1,3-thiazol-5-yl)methanol

To a well stirred solution of lithium aluminium hydride (1.52 g) in dry tetrahydrofuran (50 ml) at 0° C., was slowly added a solution of ethyl 4-methyl-2-[4-(trifluoromethyl)phenyl]-thiazole-5-carboxylate (12.6 g) in dry tetrahydrofuran (50 ml). The mixture was stirred at room temperature for 2 hours. The reaction was quenched by slow addition at 0° C. of water (2 ml), 5N NaOH (2 ml) and water (6 ml). The precipitate was filtered, washed with ethyl acetate, methanol, dichloromethane and tetrahydrofuran. After evaporation, a yellow solid was obtained, that was crystallized from methanol-water to afford the title compound as a yellow solid.

1. customThe reaction was quenched by slow addition at 0° C. of water (2 ml), 5N NaOH (2 ml) and water (6 ml)
2. filtrationThe precipitate was filtered
3. washwashed with ethyl acetate, methanol, dichloromethane and tetrahydrofuran
4. customAfter evaporation
5. customa yellow solid was obtained
6. customthat was crystallized from methanol-water

ORDレコード

ord-fcce98f8ec4e465b835e6ebfda960211

出典データセット

uspto-grants-2007_03

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07196107B2