Asymmetric Library Synthesis of P-Chiral <i>t</i>-Butyl-Substituted Secondary and Tertiary Phosphine Oxides
作者:Shi-Guang Li、Minglei Yuan、Filip Topic、Zhengxu S. Han、Chris H. Senanayake、Youla S. Tsantrizos
DOI:10.1021/acs.joc.9b00945
日期:2019.6.7
An asymmetric synthesis, amenable to library preparation of structurally diverse P-chiral t-butyl substituted secondary phosphine oxides (SPOs) and tertiary phosphine oxides (TPOs), was developed. A P-chiral H-phosphinate building block was prepared via a two-step, one-pot condensation of a chiral auxiliary with t-BuPCl2, followed by hydrolysis. Nucleophilic displacement of the chiral auxiliary with
开发了一种不对称合成方法,该方法适合于用文库制备结构多样的P-手性叔丁基取代的仲膦氧化物(SPO)和叔膦氧化物(TPO)。甲P -手性H-次膦积木经由的手性助剂与两步,一锅缩合制备吨-BuPCl 2,接着进行水解。用格氏试剂将手性助剂亲核置换,然后水解,提供了P-手性SPO的文库。用亲电试剂原位处理预水解中间体也提供了高对映体纯度的P-手性TPO库。