Enantioselective Copper‐Catalyzed Three‐Component Carboboronation of Allenes: Access to Functionalized Dibenzo [
<i>b,f</i>
][1,4]oxazepine Derivatives
作者:Hao Deng、Ziwei Meng、Sifan Wang、Zheming Zhang、Yaqi Zhang、Yu Shangguan、Fazhou Yang、Dekai Yuan、Hongchao Guo、Cheng Zhang
DOI:10.1002/adsc.201900503
日期:2019.8.5
(B2(Pin)2) to approach functionalized dibenzo[b,f][1,4]oxazepine derivatives is developed. The chiral products are obtained in up to 81% yield, >20:1 dr, and 98% ee when either a chiral diphosphine ligand or a chiral ferrocenyl‐based P,N‐ligand is used. Furthermore, the reaction exhibits reversed diastereoselectivities when the chiral diphosphine ligand and the chiral P,N‐ligand are used respectively.
开发了铜催化的具有七元环亚胺和双(频哪醇)二硼(B 2(Pin)2)的丙二烯对映选择性三组分双官能团,以逼近官能化的二苯并[ b,f ] [1,4]氧氮杂品衍生物。当使用手性二膦配体或基于手性二茂铁基的P,N-配体时,手性产物的收率高达81%,> 20:1 dr和98%ee。此外,当分别使用手性二膦配体和手性P,N-配体时,反应表现出相反的非对映选择性。