Aminobromination of olefins with TsNH<sub>2</sub>and NBS as the nitrogen and bromine sources mediated by hypervalent iodine in a ball mill
作者:Xue-Liang Wu、Jing-Jing Xia、Guan-Wu Wang
DOI:10.1039/b717333d
日期:——
A series of olefins including α,β-unsaturated ketones, cinnamates, cinnamides and styrenes have been aminobrominated with good yields and excellent diastereoselectivities under mechanical milling conditions, using TsNH2 and NBS as the nitrogen and bromine sources, promoted by (diacetoxyiodo)benzene.
Hypervalent iodine-mediated aminobromination of olefins in water
作者:Xue-Liang Wu、Guan-Wu Wang
DOI:10.1016/j.tet.2009.08.069
日期:2009.10
The PhI(OAc)2-catalyzed aminobromination of electron-deficient olefins has been achieved in pure water with TsNH2 and NBS as nitrogen and bromine sources, respectively. With a catalytic amount of PhI(OAc)2, various olefins including α,β-unsaturated ketones, cinnamates, and cinnamides could be aminobrominated efficiently, giving the vicinal bromoamines in good yields and high regio- and diastereoselectivities
Use of allylzinc halide as a source of halide: Differential addition of nucleophiles to Ts-aziridines and aldehydes under similar reaction conditions
作者:Rana Chatterjee、Satyajit Samanta、Anindita Mukherjee、Sougata Santra、Grigory V. Zyryanov、Adinath Majee
DOI:10.1016/j.tetlet.2018.12.027
日期:2019.1
halide under identical reaction conditions acts in different modes for different electrophiles. For Ts-aziridines the halide part of the allylic halide has been introduced as a nucleophile and for the carbonyl compounds the simple allylation reaction occurs. To the best of our knowledge this is the first report where the allylic zinc halide is the source of halide acting as nucleophile. The main advantages
The carbon dioxide (CO2)-induced amidobromination of olefins with bromamine-T is described. The method can be used in reactions with a wide range of olefins, both aromatic and aliphatic, as well as electron-rich and deficient olefins, leading to the regioselective formation of amidobrominated compounds.