作者:Louis V. Adriaenssens、Carolyn A. Austin、Mairi Gibson、David Smith、Richard C. Hartley
DOI:10.1002/ejoc.200600744
日期:2006.11
synthesis of 2-substituted piperidines and rapid access to multiple cyclic imines using solid phase synthesis (SPS). The Schrock carbenes, generated by reduction of thioacetals, convert resin-bound esters into enol ethers. Treatment with acid releases amino ketones that are cyclized with TMSCl to give iminium salts. Reduction introduces a chiral centre at C-2, whose absolute stereochemistry is determined
亚烷基钛试剂可实现试剂控制的高通量不对称合成 2-取代哌啶,并使用固相合成 (SPS) 快速获取多种环亚胺。通过还原硫缩醛生成的 Schrock 卡宾将树脂结合的酯转化为烯醇醚。用酸处理释放氨基酮,氨基酮与 TMSCl 环化生成亚胺盐。还原在 C-2 处引入了一个手性中心,其绝对立体化学由苯乙胺 (PEA) 手性助剂决定。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)