反应详情

To the solution of 1.0 g (2.3 mmol) [2-(4-chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-cyclohexyl-acetic acid ethyl ester in 20 mL tetrahydrofuran, 88 mg (2.3 mmol) lithium aluminium hydride were added. A slight warming occurred. After 15 min. the reaction mixture was poured on water and ethyl acetate, extracted, the aqueous phase extracted twice with ethyl acetate and the aqueous phase extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried over magnesium sulfate and evaporated. The crude product was purified by silica gel column chromatography using a MPLC system (CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane:ethyl acetate (100:0 to 100:40 v/v) to yield the title compound as an off-white solid (67%). MS (Turbo Spray): m/z=391.2 [M+H].

1. temperatureA slight warming
2. extractionextracted
3. extractionthe aqueous phase extracted twice with ethyl acetate
4. extractionthe aqueous phase extracted twice with ethyl acetate
5. washThe combined organic layers were washed with brine
6. dry with materialdried over magnesium sulfate
7. customevaporated
8. customThe crude product was purified by silica gel column chromatography
9. washeluting with a gradient of n-heptane:ethyl acetate (100:0 to 100:40 v/v)