New cyclohexyl-based chiral auxiliaries: Enantioselective synthesis of α-hydroxy acids
作者:Deevi Basavaiah、Peddinti Rama Krishna
DOI:10.1016/0040-4020(95)00771-y
日期:1995.10
2R)-2-(4-tert-Butylphenoxy)cyclohexan-1-ol (5) and (1R,2R)-2-(4-phenylphenoxy)cyclohexan-1-ol (6) have been used for the first time as chiral auxiliaries. Addition of alkylzinc chlorides to the corresponding glyoxylates 5a, 6a, after hydrolysis, provided (R)-α-hydroxy acids in high optical purities.
(1R,2R)-2-(4-叔丁基苯氧基)环己-1-醇(5)和(1R,2R)-2-(4-苯基苯氧基)环己-1-醇(6)已用于第一次作为手性助剂。水解后,将烷基氯化锌加到相应的乙醛酸酯5a,6a中,得到高光学纯度的(R)-α-羟基酸。