作者:Raul Pires、Klaus Burger
DOI:10.1016/s0040-4020(97)00619-4
日期:1997.7
(S)-Malic acid 2 is transformed into (3S)-3-hydroxy-2-pyrrolidinone (8) using hexafluoro-acetone as protecting and activating agent. Two alternative routes were developed; key step of both routes is the intramolecular aminolytic cleavage of the lactone ring of the intermediate, 5-(2-aminoethyl)-2,2-bis(trifluoromethyl)-1,3-dioxolan-4-one (7).
使用六氟丙酮作为保护和活化剂,将(S)-苹果酸2转化为(3S)-3-羟基-2-吡咯烷酮(8)。开发了两种替代路线;两种途径的关键步骤是中间体5-(2-氨基乙基)-2,2-双(三氟甲基)-1,3-二氧戊环-4-酮(7)的内酯环的分子内氨解裂解。