Preparation of Sulfonamides from Sodium Sulfonates: Ph3P ⋅ Br2 and Ph3P ⋅ Cl2 as a Mild Halogenating Reagent for Sulfonyl Bromides and Sulfonyl Chlorides
Facile Synthesis of Sulfonyl Chlorides/Bromides from Sulfonyl Hydrazides
作者:Rongxiang Chen、Shaohong Xu、Fumin Shen、Canran Xu、Kaikai Wang、Zhanyong Wang、Lantao Liu
DOI:10.3390/molecules26185551
日期:——
A simple and rapid method for efficient synthesis of sulfonyl chlorides/bromides from sulfonyl hydrazide with NXS (X = Cl or Br) and late-stage conversion to several other functional groups was described. A variety of nucleophiles could be engaged in this transformation, thus permitting the synthesis of complex sulfonamides and sulfonates. In most cases, these reactions are highly selective, simple
General Access to
<i>N</i>
−CF
<sub>3</sub>
Secondary Amines and Their Transformation to
<i>N</i>
−CF
<sub>3</sub>
Sulfonamides
作者:Leibing Wang、Jieping Wang、Sitao Ye、Beihan Jiang、Zihao Guo、Yasir Mumtaz、Wenbin Yi
DOI:10.1002/anie.202212115
日期:2022.12.5
A new and mild method for the generation of HF from triethylsilane and silver fluoride leads to a highlyefficient one-pot synthesis of N−CF3 secondary amines. Novel N−CF3 sulfonamides were constructed from these promising amine building blocks and sulfonyl bromides in an unprecedented route.
Rapid and Scalable Halosulfonylation of Strain‐Release Reagents**
作者:Helena D. Pickford、Vasyl Ripenko、Ryan E. McNamee、Serhii Holovchuk、Amber L. Thompson、Russell C. Smith、Pavel K. Mykhailiuk、Edward A. Anderson
DOI:10.1002/anie.202213508
日期:2023.1.16
hydrocarbons is described that proceeds under practical, scalable and mild conditions. Sulfonyl halides featuring aryl, heteroaryl and alkyl substituents are generated in situ from sulfinate salts and convenient halogen atom sources. This chemistry enables the synthesis of an array of halogen/sulfonyl-substituted bioisosteres and cyclobutanes, on up to multidecagram scale. Hal=Halogen.
An efficient and mild oxidative approach from thiols to sulfonyl derivatives with DMSO/HBr
作者:Hongye Wang、Zhaoting Li、Rongheng Dai、Ning Jiao、Song Song
DOI:10.1039/d3sc04945k
日期:——
A mild and practical method for synthesizing sulfonyl derivatives, which have a wide range of applications in pharmaceuticals, materials, and organic synthesis, was described through the oxidative functionalization of thiols with DMSO/HBr. The simple conditions, low cost and ready availability of DMSO/HBr, as well as the versatility of the transformations, make this strategy very powerful in synthesizing