Catalytic enantioselective addition of terminal 1,3-diynes to N-sulfonyl aldimines: access to chiral diynylated carbinamines
作者:Tian-Lin Liu、Heng-Xia Zhang、Yan Zheng、Qingwei Yao、Jun-An Ma
DOI:10.1039/c2cc37290h
日期:——
An efficient method for the asymmetric synthesis of chiral diynylated carbinamines is described. The direct catalytic enantioselective addition of terminal 1,3-diynes to N-sulfonyl aldimines proceeded smoothly under mild reaction conditions to produce diynylated carbinamines in up to 98% yield and 99% ee.
Asymmetric Enynylation of<i>N</i>-Sulfonyl Aldimines Catalyzed by Zn-BINOL Complexes
作者:Zhen-Yan Yang、Tian-Lin Liu、Yan Zheng、Shen Li、Jun-An Ma
DOI:10.1002/ejoc.201500400
日期:2015.6
An efficient enynylation of N-sulfonyl aldimines is described herein. In the presence of Zn-BINOLcomplexes, catalytic enantioselective addition reactions of terminal 3-en-1-ynes to N-sulfonyl aldimines proceed smoothly to produce enynylated carbinamines in up to 96 % yield and 95 % ee. The adducts are versatile synthetic intermediates that readily undergo Pauson–Khand cycloaddition reactions to give
Hydrosulfonylation of Alkenes with Sulfonyl Imines via Ir/Cu Dual Photoredox Catalysis
作者:Xian Du、Jing-Song Zhen、Xiao-Hong Xu、Han Yuan、Yi-Hui Li、Yeqin Zheng、Can Xue、Yong Luo
DOI:10.1021/acs.orglett.2c01260
日期:2022.6.10
sulfonyl imines as sulfonyl radical precursors for hydrosulfonylation of activated alkenes via visible-light irradiation. By preinstallation of functional groups into the sulfonamides and subsequent hydrosulfonylation, a variety of complex sulfones were synthesized with good efficiency under Ir/Cu dualphotoredoxcatalysis. Additionally, this protocol expands the research in late-stage N–S bond modification
Photocatalytic Late-Stage Functionalization of Sulfonamides via Sulfonyl Radical Intermediates
作者:Michael J. Tilby、Damien F. Dewez、Loïc R. E. Pantaine、Adrian Hall、Carolina Martínez-Lamenca、Michael C. Willis
DOI:10.1021/acscatal.2c01442
日期:——
access radical chemistry, which is harnessed by combining pharmaceutically relevant sulfonamides with an assortment of alkene fragments. Additionally, the sulfinate anion can be readily obtained, further broadening the options for sulfonamide functionalization. Mechanisticstudies suggest that energy-transfer catalysis (EnT) is in operation.