A novel Fe-catalyzed olefin hydroamination with aryldiazo sulfones for accessing alkylarylazo compounds has been successfully developed. Aryldiazo sulfones are used as radical acceptors, and N–N double bonds will be regenerated when an arene sulfonyl group leaves. The reaction features mild reaction conditions and a broad substrate scope, allowing access to many azo compounds that would be difficult
Palladium-catalyzed Suzuki cross-coupling of N′-tosyl arylhydrazines
作者:Jin-Biao Liu、Hui Yan、Hui-Xuan Chen、Yu Luo、Jiang Weng、Gui Lu
DOI:10.1039/c3cc41421c
日期:——
The first palladium-catalyzedSuzukicross-coupling of N'-tosyl arylhydrazines with various organoboron reagents has been developed for the preparation of biaryl compounds in high yields. N'-Tosyl arylhydrazine as a readily available and stable electrophile also demonstrated its generality in a number of coupling reactions.
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