Efficient Synthesis of α-Allylbutenolides from Allyl Ynoates via Tandem Ligand-Enabled Au(I) Catalysis and the Claisen Rearrangement
作者:Huiyan Wang、Ting Li、Zhitong Zheng、Liming Zhang
DOI:10.1021/acscatal.9b03501
日期:2019.11.1
A facile construction of α-allylbutenolides from readily available allyl ynoates has been developed via tandem gold-catalyzed alkyne isomerization to allene and cycloisomerization, the Claisen rearrangement and a double bond migration. The gold catalysis is enabled by a bifunctional phosphine ligand featuring a critical remote tertiary amino group, and the reaction tolerates a range of substituents
通过串联金催化的炔烃异构化为丙二烯和环异构化,克莱森重排和双键迁移,已经开发了一种由易得的烯丙基壬酸酯容易地构建α-烯丙基丁烯化物的方法。金的催化作用是通过具有关键的远端叔氨基的双功能膦配体实现的,该反应可耐受一系列取代基,收率最高可达96%。