L-aspartic acid bis(trimethylsilyl) ester: a convenient starting material for the acylation of L-aspartic acid.
作者:Ana M. Castano、Antonio M. Echavarren
DOI:10.1016/0040-4020(92)85013-5
日期:1992.1
Reaction of L-aspartic acid with excess of bis(trimethylsilyl)amine under reflux provides optically pure L-aspartic acid bis(trimethylsilyl) ester in quantitative yield. This silyl ester reacts with a variety of acylating reagens in tetrahydrofuran to give N-protected aspartic acids and dipeptides in good yields without racemization.