A Copper-Catalyzed Three-Component Reaction of Triethoxysilanes, Sulfur Dioxide, and Hydrazines
作者:Xianbo Wang、Lijun Xue、Zhiyong Wang
DOI:10.1021/ol5018849
日期:2014.8.1
A three-component reaction of triethoxysilanes, sulfurdioxide, and hydrazines catalyzed by copper(II) acetate is reported, leading to N-aminosulfonamides in good yields. Not only triethoxy(aryl)silanes but also triethoxy(alkyl)silanes are compatible during the process of insertion of sulfurdioxide. Additionally, diethoxydiarylsilanes are suitable under the conditions as well.
Visible-Light Photoredox-Catalyzed Aminosulfonylation of Diaryliodonium Salts with Sulfur Dioxide and Hydrazines
作者:Nai-Wei Liu、Shuai Liang、Georg Manolikakes
DOI:10.1002/adsc.201601341
日期:2017.4.17
three‐component synthesis of N‐aminosulfonamides starting from diaryliodonium salts, hydrazines and sulfurdioxide is reported. This reaction proceeds under mild conditions at room temperature and is driven by visible light. A simple bisulfite salt can be used as a readily available and easy‐to‐handle sulfurdioxide source. Mechanistic studies support a catalytic photoredox pathway with the diaryliodonium
Aminosulfonylation of aromatic amines, sulfur dioxide and hydrazines
作者:Danqing Zheng、Ying Li、Yuanyuan An、Jie Wu
DOI:10.1039/c4cc03032j
日期:——
A facile route to aryl N-aminosulfonamides under mild conditions is provided. The reaction of aromatic amines (including heteroaromatic amines), sulfurdioxide, and hydrazines proceeds efficiently with good functional group tolerance. The in situ generated diazonium ion is involved in the aminosulfonylation process.
A four-component reaction of aryldiazonium tetrafluoroborates, sulfur dioxide, 1,2-dibromoethane, and hydrazines
作者:Danqing Zheng、Yunyan Kuang、Jie Wu
DOI:10.1039/c5ob01765c
日期:——
A four-component reaction of aryldiazonium tetrafluoroborates, sulfurdioxide, 1,2-dibromoethane, and hydrazines under metal-free conditions is described, providing a novel and efficient approach to 2-arylsulfonyl hydrazones. This transformation proceeds smoothly via insertion of sulfurdioxide under mild conditions with good functional group tolerance.
Practical synthesis and biological screening of sulfonyl hydrazides
作者:João Macara、Catarina Caldeira、José Cunha、Jaime A. S. Coelho、Maria J. S. A. Silva、Konrad Krämer、Christoph W. Grathwol、Stefan Bräse、M. Manuel B. Marques
DOI:10.1039/d2ob02160a
日期:——
synthesis of sulfonyl hydrazides mediated by hypervalent iodine is described. Taking advantage of the umpolung properties of hypervalent iodine reagents, the polarity of sodium sulfinate salts is reversed, and a key intermediate is generated and reacted with mono- and disubstituted hydrazines. To highlight the practical utility of this protocol, a diverse range of sulfonyl hydrazides were synthesized in