(R)- and (S)-3-Hydroxy-4,4-dimethyl-1-phenyl-2-pyrrolidinone, new chiral auxiliaries for the asymmetric synthesis of α-arylpropanoic acids
作者:Pelayo Camps、Sílvia Giménez
DOI:10.1016/0957-4166(95)00110-b
日期:1995.4
rac-α-arylpropanoyl chlorides with (R)- and (S)-3-hydroxy-4,4-dimethyl-1-phenyl-2-pyrrolidinone(R)- and (S)-1, in the presence of triethylamine, under standard esterification conditions, gave (R,R)- and (S,S)-3, respectively, with high diastereoselectivity. Controlled acidic hydrolysis afforded the corresponding (R)- or (S)-α-arylpropanoic acids with high enantioselectivity, the chiral auxiliary being recovered
rac-α-芳基丙酰氯与(R)-和(S)-3-羟基-4,4-二甲基-1-苯基-2-吡咯烷酮(R)-和(S)-1的反应在在标准酯化条件下,三乙胺分别得到(R,R)-和(S,S)-3 ,具有高非对映选择性。受控的酸性水解得到具有高对映选择性的相应的(R)-或(S)-α-芳基丙酸,手性助剂被有效地回收。