Silver(<scp>i</scp>)-promoted insertion into X–H (X = Si, Sn, and Ge) bonds with N-nosylhydrazones
作者:Zhaohong Liu、Qiangqiang Li、Yang Yang、Xihe Bi
DOI:10.1039/c6cc09650f
日期:——
Silver(I)-promoted carbene insertion into X-H (X = Si, Sn, and Ge) bonds has been realized by using unstable diazo compounds, which are generated in situ from N-nosylhydrazones as carbene precursors.
Dehydrazination of adducts of phenylsulfonylhydrazones and phosphorus compounds was promoted by a nitro substituent on the ring to afford derivatives of a phosphine oxide and phosphonates.
Silver-Catalyzed Cyclopropanation of Alkenes Using <i>N</i>-Nosylhydrazones as Diazo Surrogates
作者:Zhaohong Liu、Xinyu Zhang、Giuseppe Zanoni、Xihe Bi
DOI:10.1021/acs.orglett.7b03374
日期:2017.12.15
[2 + 1] cyclopropanation of sterically hindered internal alkenes with diazo compounds in which room-temperature-decomposable N-nosylhydrazones are used as diazo surrogates is reported. The unexpected unique catalytic activity of silver was ascribed to its dual role as a Lewis acid activating alkene substrates and as a transition metal forming silver carbenoids. A wide range of internal alkenes, including
290. The reactions of nitrosulphonyl chlorides. Part III. Identification and characterisation of aldehydes and ketones as nitrobenzenesulphonhydrazones