Photoredox/cobaloxime co-catalyzed allylation of amines and sulfonyl hydrazines with olefins to access α-allylic amines and allylic sulfones
作者:Hui Xu、Hong Zhang、Qing-Xiao Tong、Jian-Ji Zhong
DOI:10.1039/d1ob01307f
日期:——
reported a dual-catalytic platform for the allylation of amines and sulfonyl hydrazines with olefins to selectively access α-allylic amines and allylic sulfones in good yields by combining photoredox catalysis and cobaloxime catalysis. This strategy avoided the use of a stoichiometric amount of terminal oxidant and the use of pre-functionalized allylic precursors, representing a green and ideal atom- & step-economical
Fast sulfonylation of pyridine/quinoline N-oxides induced by iodine is demonstrated herein. The regioselective protocol occurs under metal-free conditions in a short reaction time (10 min), exhibiting high efficiency (up to 92% yield) and good compatibility (up to 33 examples). A gram-scale reaction was conducted with only a slight loss of production.
Desulfinative palladium‐catalyzed cross‐coupling of arylsulfonyl hydrazides with aryl bromides under air
作者:Qingling Liu、Bo Yang
DOI:10.1002/aoc.5140
日期:2019.10
A highly efficient and mild palladium‐catalyzed cross‐coupling of arylsulfonyl hydrazides and aryl bromides for the selective synthesis of unsymmetrical biaryls has been developed. This methodology has the advantages of easily accessible starting materials, functional group tolerance and a wide range of substrates, which providerapidaccess to biaryls derivatives. In this protocol, abundant and stable
Manganese catalysed sulfenylation of N-methyl amides with arenesulfonyl hydrazides
作者:Jinwei Sun、Yi Wang、Yi Pan
DOI:10.1039/c5ob00133a
日期:——
A convenient oxidative sulfenylation method for the formation of various sulfenyl amides has been reported. Arenesulfonyl hydrazine as a sulfur source in the presence of a manganese salt can activate the sp3 C–H bond of N-methyl amides through a free-radical pathway using di-tert-butyl peroxide (DTBP).