由脱羧三溴化作用选择性地制备三溴甲基酮和三溴乙烯基衍生物。在AgOAc(10mol%)存在下,丙酸衍生物与二溴异氰尿酸(DBCA)/ H 2 O之间的反应主要得到三溴甲基酮衍生物。当用2,2,6,6-四甲基-1-哌啶基氧基(TEMPO)代替AgOAc进行相同的反应时,仅以高收率形成了三溴乙烯基衍生物。发现乙炔基溴是中间体。
作者:Samuel Braverman、Marina Cherkinsky、E.V.K Suresh Kumar、Hugo E Gottlieb
DOI:10.1016/s0040-4020(00)00360-4
日期:2000.6
competition between 1,2- vs. 1,3-elimination and nucleophilic substitution. Favorskiirearrangement was the preferred process, but in those cases where electronic or steric effects were present, nucleophilic substitution became dominant. No evidence of ketene formation was detected. The mechanism of formation of the various rearrangement products is discussed.
Acetate-catalyzed Bromination and Exchange Reactions of 2-Butanone
作者:J. W. Thorpe、J. Warkentin
DOI:10.1139/v72-514
日期:1972.10.1
Products from bromination of 2-butanone in an aqueous acetate buffer were studied in order to compare the regiochemistry of monobromination with that of deuterium exchange. The good agreement found...
研究了 2-丁酮在醋酸盐缓冲液中溴化的产物,以比较单溴化与氘交换的区域化学。好协议发现...
Decarboxylative Tribromination for the Selective Synthesis of Tribromomethyl Ketone and Tribromovinyl Derivatives
作者:Aravindan Jayaraman、Eunjeong Cho、Jimin Kim、Sunwoo Lee
DOI:10.1002/adsc.201800851
日期:2018.10.18
Tribromomethyl ketone and tribromovinyl derivatives were selectively prepared from the decarboxylative tribromination. The reaction between propiolic acid derivatives and dibromoisocyanuric acid (DBCA)/H2O afforded predominantly a tribromomethyl ketonederivative in the presence of AgOAc (10 mol%). When the same reaction was conducted with 2,2,6,6‐tetramethyl‐1‐piperidinyloxy (TEMPO) instead of AgOAc
由脱羧三溴化作用选择性地制备三溴甲基酮和三溴乙烯基衍生物。在AgOAc(10mol%)存在下,丙酸衍生物与二溴异氰尿酸(DBCA)/ H 2 O之间的反应主要得到三溴甲基酮衍生物。当用2,2,6,6-四甲基-1-哌啶基氧基(TEMPO)代替AgOAc进行相同的反应时,仅以高收率形成了三溴乙烯基衍生物。发现乙炔基溴是中间体。
Modular and Highly Stereoselective Approach to All-Carbon Tetrasubstituted Alkenes
作者:Vladislav Kotek、Hana Dvořáková、Tomáš Tobrman
DOI:10.1021/ol503624v
日期:2015.2.6
A modular and completely stereoselectiveapproach for the construction of all-carbon tetrasubstituted alkenes is described. It is based on the three-fold, sequential metal-catalyzed, cross-coupling functionalization of simple enolphosphate dibromide templates with carbon nucleophiles, affording tetrasubstituted alkenes as single isomers.