A newly developed Ï-allylpalladium with a (â)-β-pinene framework and an isobutyl side chain catalyzed the enantioselective allylation of imines in good yields and enantioselectivities (20 examples, up to 98% ee). An efficient enantioselective synthesis of the (R)-α-propyl piperonylamine part of DMP 777, a human leukocyte elastase inhibitor and (R)-pipecolic acid have been achieved as a useful application of this methodology.
一种新开发的具有(â)-δ-
蒎烯框架和异丁基侧链的Ï-烯丙基
钯催化了
亚胺的对映体选择性烯丙基化,产率和对映体选择性良好(20 例,ee高达 98%)。作为该方法的有益应用,已实现了对人白细胞弹性蛋白酶抑制剂
DMP 777 的(R)-δ-丙基
胡椒基胺部分和(R)-
哌啶醇酸的高效对映选择性合成。