作者:Paul W. Groundwater、Toqir Sharif、Andrea Arany、David E. Hibbs、Michael B. Hursthouse、Miklòs Nyerges
DOI:10.1016/s0040-4039(97)10821-8
日期:1998.3
A novel synthesis of didehydroamino acid (DDAA) esters 4 is described, starting from aldimines 1. The mechanism for this reaction involves the cycloaddition of an azomethine ylide 2 to an imine 1, followed by the base-catalysed ring-opening of the imidazolidine intermediate 6. This method has also been extended to the synthesis of DDAA esters 4h-j catalysed by an imine 1a.
从醛亚胺1开始,描述了一种双脱氢氨基酸(DDAA)酯4的新型合成方法。该反应的机制包括将亚甲亚胺叶立德2环加成至亚胺1,然后由碱催化的咪唑烷中间体6的开环。该方法也已扩展到亚胺1a催化的DDAA酯4h-j的合成。