Transition metal-free access to 3,4-dihydro-1,2-oxaphosphinine-2-oxides from phosphonochloridates and chalcones through tandem Michael addition and nucleophilic substitution
作者:Zhicheng Fu、Simin Sun、Anjian Yang、Fang Sun、Jiaxi Xu
DOI:10.1039/c9cc06352h
日期:——
A novel and transition metal-free synthesis of 3,4-dihydro-1,2-oxaphosphinine 2-oxides was developed. LiHMDS-mediated tandem Michael addition and nucleophilic substitution of readily available phosphonochloridates and chalcones afforded a variety of valuable 3,4-dihydro-1,2-oxaphosphinine 2-oxides bearing diverse functionalities in excellent yields and satisfactory to good diastereoselectivity (up
开发了一种新颖且无过渡金属的3,4-二氢-1,2-氧杂膦2氧化物合成方法。LiHMDS介导的串联迈克尔加成反应和亲核取代易得的膦酰氯和查耳酮提供了各种有价值的3,4-二氢-1,2-氧杂膦酸2-氧化物,具有优异的收率和令人满意的非对映选择性(高达99%),具有多种功能产量,最高可达99:1 dr)。