Stereoselective debromination of aryl-substituted vic-dibromide with indium metal
作者:Brindaban C. Ranu、Sankar K. Guchhait、Arunkanti Sarkar
DOI:10.1039/a806530f
日期:——
Debromination of both meso and dl (erythro and threo) aryl-substituted vic-dibromides with indium metal in MeOH leads to trans-alkenes exclusively.
在甲醇中,钌金属对间位和对位(赤型和苏型)芳基取代的连二溴化物进行脱溴反应,仅生成反式烯烃。
A Highly Efficient Method for the Bromination of Alkenes, Alkynes and Ketones Using Dimethyl Sulfoxide and Oxalyl Bromide
作者:Hongyu Tian、Baoguo Sun、Rui Ding、Jiaqi Li、Wenyi Jiao、Mengru Han、Yongguo Liu
DOI:10.1055/s-0037-1609560
日期:2018.11
α-bromoketones. The pairing of DMSO and oxalyl bromide is reported as a highlyefficient brominating reagent for various alkenes, alkynes and ketones. This bromination approach demonstrates remarkable advantages, such as mild conditions, low cost, short reaction times, provides excellent yields in most cases and represents a very attractive alternative for the preparation of dibromides and α-bromoketones.
Darstellung, NMR- und IR-spektren von 2,3-dibrom- und 2-jod-3-chlor-1,3-diphenylpropanonen-(1)
作者:F.G. Weber
DOI:10.1016/s0040-4020(01)82967-7
日期:1969.1
Reaction of IC1 with chalcones yielded 2-iodo-3-chloro-1,3-diphenylpropanones-(1) (II), which were identified by their 1H-NMR spectra as erythro isomers. The IR spectra of the II were compared with the IR spectra of the 2,3-dibromo compounds (I) in the range of 400 to 700 cm−1 and in the carbonyl frequency region.
I2O5-mediated bromohydroxylation and dibromination of olefins using KBr in water
作者:Yajun Wang、Jinxi Wang、Yun Xiong、Zhong-Quan Liu
DOI:10.1016/j.tetlet.2014.03.064
日期:2014.4
An efficient and green bromohydroxylation and dibromination of various olefins mediated by I2O5 has been developed in this work. A series of olefins gave the corresponding α-bromo-alcohols and dibromides as the major products using KBr as the brominating reagent in aqueous medium at room temperature. The diastereo- and regio-selectivities are extremely high.
在这项工作中,已经开发了由I 2 O 5介导的各种烯烃的有效且绿色的溴羟基化和二溴化。在室温下,在水介质中使用KBr作为溴化试剂,一系列烯烃得到了相应的α-溴代醇和二溴化物作为主要产物。非对映选择性和区域选择性非常高。
A Facile and Efficient Method for the Debromination of vic-Dibromides to Alkenes with BiCl<sub>3</sub>/Indium System