Stereoselective synthesis of enantiopure cyclic α-aminophosphonic acids: Direct observation of inversion at phosphorus in phosphonate ester silyldealkylation by bromotrimethylsilane
作者:Vladimir A. Alfonsov、Charles E. McKenna、Evgenia V. Bayandina、Boris A. Kashemirov、Liliya N. Yarmieva、Lyudmila N. Punegova、Olga N. Kataeva
DOI:10.1002/hc.20480
日期:2008.9
The paper describes a simple, direct synthesis of enantiopure cyclic α-aminophosphonic acids on the basis of silyldealkylation and followed by hydrolysis of the parent diastereoisomeric cyclic 1,4,2-oxazaphosphorines, which have been obtained by intramolecular stereospecific nucleophilic addition of phosphites to imines. In this approach, the high diastereoselectivity of the stereocontrolling penultimate
该论文描述了一种简单、直接的对映纯环状 α-氨基膦酸的合成方法,该方法基于甲硅烷基脱烷基化,然后水解母体非对映异构环状 1,4,2-氧氮杂膦,这些非对映异构体环状 1,4,2-氧氮杂膦通过亚磷酸酯的分子内立体有择亲核加成作用获得. 在这种方法中,通过在非常温和的非外消旋条件下将中间体酯转化为最终的膦酸,可以保持立体控制倒数第二步的高非对映选择性。© 2008 Wiley Periodicals, Inc. 杂原子化学 19:575–582, 2008; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc.20480