Preparation of proline derived lithium amide bases and their use in enantioselective deprotonation of meso epoxides
作者:Shirley K. Hendrie、John Leonard
DOI:10.1016/s0040-4020(01)90297-2
日期:1987.1
proline derived chiral lithium amide bases is described. (S)-2-(Pyrrolidinomethyl) pyrrolidine, prepared by the new route, has been used to deprotonate cis and transtbutyldimethylsiloxy-3,4-epoxycyclopentane enantioselectively, thus generating chiral cis and transtbutyldimethylsiloxy-2-cyclopenten-4-ols. The products had higher enantiomeric purity than those produced when the base was prepared by a
描述了制备一系列脯氨酸衍生的手性锂酰胺碱的替代方法。(S)-2-(吡咯烷甲基)吡咯烷,由新的途径制备,已使用去质子顺和反式吨甲基甲硅烷氧基-3,4-环氧环戊烷对映选择性,从而产生手性的顺式和反式吨甲基甲硅烷氧基-2-环戊烯-4- ols。该产物的对映体纯度高于通过先前报道的方法制备碱时所产生的对映体纯度。