Triethylaluminum- or Triethylborane-Induced Free Radical Reaction of Alkyl Iodides and α,β-Unsaturated Compounds
作者:Jing-Yuan Liu、Yoeng-Jiunn Jang、Wen-Wei Lin、Ju-Tsung Liu、Ching-Fa Yao
DOI:10.1021/jo020681b
日期:2003.5.1
beta-unsaturated compounds, 1a-c, 9, 13, and 17, were used as reactants in free radical conjugate addition reactions with different radicals generated from alkyl iodides such as 3, 4, or 5 in the presence of triethylborane-oxygen in air or via the use of triethylaluminum-benzoyl peroxide as a free radical initiator. When the reactions were carried out using triethylborane-air, the products, in most cases,
在自由基共轭加成反应中,一系列的α,β-不饱和化合物1a-c,9、13和17被用作反应物,它们与烷基碘化物(例如3、4或5)在存在氢的情况下产生不同的自由基。空气中的三乙基硼烷-氧或通过使用三乙基铝-过氧化苯甲酰作为自由基引发剂。当使用三乙基硼烷-空气进行反应时,在大多数情况下,产物是清洁的并且易于纯化。然而,当在相似条件下,与三乙基铝-过氧化苯甲酰和烷基碘化物反应使用的反应性较低的底物用作迈克尔受体时,会产生较高的1,4-加合物收率和较少的副反应。方案1中提出了一种机制。