Chelation-controlled diastereoselective construction of N-aryl-, N-acyl/tosylhydrazono β-substituted aspartate derivatives via Barbier-type reaction
作者:Nayyar Ahmad Aslam、Srinivasarao Arulananda Babu、Arya Jayadev Sudha、Makoto Yasuda、Akio Baba
DOI:10.1016/j.tet.2013.05.130
日期:2013.8
involvement of a chelation-controlled TS. The synthesis of functionalized 1,4-diols, cis piperidine-2,3-dicarboxylate derivative and β-ethyl aspartic acid hydrochloride was performed using the N-substituted β-vinyl aspartates obtained in this work. The stereochemistry of representative products was unambiguously established from the single crystal X-ray structure analyses.
通过铟介导的4-溴巴豆酸烷基酯或α-卤代酯与N-芳基的铟介导的Barbier型加成反应,进入几种具有两个连续立体中心的N-取代-β-乙烯基天冬氨酸和β-烷基天冬氨酸烷基酯衍生物的立体选择性合成包括N -PMP)的α-亚氨基-和N-酰基/甲苯磺酰hydr酯。仅在醇介质中具有顺式立体化学的β-烷基天冬氨酸衍生物的形成揭示了螯合控制的TS的参与。使用N进行官能化的1,4-二醇,顺式哌啶-2,3-二羧酸酯衍生物和β-乙基天冬氨酸盐酸盐的合成在这项工作中获得的取代的β-乙烯基天冬氨酸盐。从单晶X射线结构分析明确确定了代表性产品的立体化学。