作者:E. Vedejs、O. Daugulis、L. A. Harper、J. A. MacKay、D. R. Powell
DOI:10.1021/jo030007+
日期:2003.6.1
The synthesis and evaluation of chiral phosphines 11, 15a, 19a, 24a, and 28a as nucleophilic catalysts for anhydride activation and kinetic resolution of alcohols is described. The relative reactivity follows the order 11a > 11b > 15a > 1 in the monocyclic series, and 24a > 19a > 28ain the bicyclic series, with an overall rate advantage of ca. 2 orders of magnitude for the bicyclic phospholanes over
描述了手性膦11、15a,19a,24a和28a的合成和评估,它们是用于酸酐活化和醇动力学拆分的亲核催化剂。相对反应性在单环系列中遵循11a> 11b> 15a> 1的顺序,在双环系列中遵循24a> 19a> 28a的顺序,总速率优势约为。双环膦酸酯比单环类似物高2个数量级。双环膦酸酯对醇酰化反应性的增加归因于构象效应和基态不稳定的高度缔合机理。动力学分辨率数据证明了24a的前景良好的对映选择性。