Application of poly(vinylphenyltrimethylammonium tribromide) resin as an efficient polymeric brominating agent in the <b>α</b>-bromination and <b>α</b>-bromoacetalization of acetophenones
作者:Bingbing Han、Zubiao Zheng、Dongcheng Zheng、Lei Zhang、Peng Cui、Jianjun Shi、Changjiang Li
DOI:10.1080/00397911.2019.1631348
日期:2019.10.2
Abstract The applications of a new supported tribromide reagent based on poly(vinylbenzyltrimethylammonium hydroxide) resin (Amberlite 717) were reported. This supported tribromide resin was used directly in α-bromination and α-bromoacetalization of acetophenones without any other catalyst under mild conditions. The effects of solvents and the amount of the supported tribromide resin on the reactions
One-pot synthesis of <font>α</font>-bromoacetals of ketones from secondary alcohols and 1,3-dibromo-5,5-dimethylhydantoin (DBDMH) in ethylene glycol
作者:Bingbing Han、Zubiao Zheng、Fang Wu、Aidong Wang
DOI:10.1080/00397911.2017.1378681
日期:2017.12.17
of ketones were prepared from various secondary alcohols with 1,3-dibromo-5,5-dimethylhydantoin (DBDMH) and ethylene glycol through oxidation, bromination, and acetalization in one pot without the use of other catalysts under mild conditions. The effects of DBDMH, the solvent, and N-bromosuccinimide on the reaction were investigated. Under the optimal conditions, most α-bromoacetals of ketones were