Alkene Difunctionalization Triggered by a Stabilized Allenyl Radical: Concomitant Installation of Two Unsaturated C−C Bonds
作者:Yunlong Wei、Hong Zhang、Xinxin Wu、Chen Zhu
DOI:10.1002/anie.202106145
日期:2021.9.6
Radical-mediated difunctionalization of alkenes provides a promising approach to introduce one alkenyl or alkynyl group to target compounds. However, simultaneous installation of two unsaturated C−C bonds via alkene difunctionalization remains elusive, attributable to the high instability and transient lifetimes of alkenyl and alkynyl radicals. Herein, we report the photocatalytic 1,2-alkynylalkenylation and
Palladium-Catalyzed Asymmetric Addition of Diarylphosphines to α,β-Unsaturated Sulfonic Esters for the Synthesis of Chiral Phosphine Sulfonate Compounds
作者:Junzhu Lu、Jinxing Ye、Wei-Liang Duan
DOI:10.1021/ol402351c
日期:2013.10.4
Highly stereoselective addition of diarylphosphines to α,β-unsaturated sulfonic esters catalyzed through a PCP pincer–Pd complex is developed to synthesize chiral phosphine sulfonic esters with excellent enantioselectivity (up to 99.5% ee). The transformation of the chiral adduct into a useful palladium phosphine sulfonate complex is also demonstrated.
Palladium-Catalyzed Asymmetric 1,4-Addition of Diarylphosphines to α,β-Unsaturated Sulfonamides
作者:Fanhua Xiao、Wei-Liang Duan、Guo-Fa Dai、Yu-Chuan Song
DOI:10.1055/s-0036-1591593
日期:2018.9
Abstract A pincer palladium-catalyzedasymmetric 1,4-addition of diarylphosphines to α,β-unsaturated sulfonamides was realized for the synthesis of chiral sulfonamide phosphines with up to 98% ee under mild conditions. A pincer palladium-catalyzedasymmetric 1,4-addition of diarylphosphines to α,β-unsaturated sulfonamides was realized for the synthesis of chiral sulfonamide phosphines with up to 98%