Optically active (C₁-C₃)alkyl 2R-chroman-2-carboxylates are prepared by partial hydrolysis of the corresponding racemic ester using a microbial lipase as catalyst. Said 2R-chromancarboxylate is converted via novel 2R-(hydroxymethyl)chroman, 2R-(trifluoromethylsulfonyloxymethyl)chroman and 2R-benzylchroman intermediates into 2R-benzylchroman-6-carbaldehyde, a compound of known utility in the manufacture of certain hypoglycemic agents.
以微
生物脂肪酶为催化剂,通过部分
水解相应的外消旋酯,制备光学活性(C₁-C₃)烷基 2R-色满-2-
羧酸酯。所述 2R-
色烷羧酸酯通过新型 2R-(羟甲基)
色烷、2R-(三
氟甲基磺酰氧甲基)
色烷和 2R-苄基
色烷中间体转化为 2R-苄基
色烷-6-
甲醛,这是一种已知可用于制造某些降糖药的化合物。