Aspects of stereocontrol in the L-Selectride reduction of 4-acyl-1,3-dioxolane derivatives
作者:Jeremy Robertson、William P. Unsworth、Scott G. Lamont
DOI:10.1016/j.tet.2010.01.107
日期:2010.3
application of L-Selectride, either alone or in combination with ZnCl2, to aryl ketones 1, 8 and 11 resulted in highly anti-stereoselective reduction. In contrast, lactols 22 and 23 gave a moderate syn-preference using L-Selectride alone and a high syn-preference in the presence of ZnCl2. Uniquely, high anti- stereoselectivity was observed in the reduction of o-anisyl lactol 37 with L-Selectride alone, which
三仲丁基硼氢化锂,无论是单独使用或与氯化锌组合中的应用2,以芳基酮1,8和11导致了高度抗-stereoselective减少。相反,仅使用L-Selectride的乳糖醇22和23具有中等的顺式偏好,而在ZnCl 2的存在下具有较高的顺式偏好。独特地,仅用L-Selectride还原邻茴香基乳糖醇37即可观察到高的抗立体选择性,当ZnCl 2转化为高顺式偏好时 在场。