Ethanol → Fasiglifam

Participants

Reaction Conditions

Reaction Steps

Under an argon atmosphere, to [6-({2′,6′-dimethyl-4′-[3-(methylsulfonyl)propoxy]biphenyl-3-yl}methoxy)-1-benzofuran-3-yl]acetic acid (522 mg), dichloro[(+)-1,2-bis((2R,5R)-2,5-diisopropylphosphorano)benzene]ruthenium (II)-N,N-dimethylformamide complex (7.4 mg) in an autoclave container was added a solution of dehydrated ethanol (6 mL) containing triethylamine (0.139 mL), and the mixture was stirred at 50° C. for 24 hr under a hydrogen atmosphere (1 MPa). The reaction mixture was concentrated, 10% aqueous citric acid solution (25 mL) and ethyl acetate (25 mL) were added, and an extraction operation was performed. The aqueous layer was extracted with ethyl acetate (25 mL), and the combined organic layer was washed with water (25 mL), dried over sodium sulfate and concentrated. The crude product was washed with diisopropyl ether. After filtration, the obtained solid was dried at 50° C. under reduced pressure to give the title compound (523 mg) as white crystals. 80.0% ee.

Provenance & Evidence