Indium controlled regioselective 1,4-alkylarylation of 1,3-dienes with α-carbonyl alkyl bromides and N-heterocycles
作者:Chang-Cheng Gu、Xuan-Hui Ouyang、Ren-Jie Song、Jin-Heng Li
DOI:10.1039/c9cc08903a
日期:——
We here describe a new, selective indium-promoted silver-mediated intermolecular oxidative 1,4-alkylarylation of 1,3-dienes with α-carbonyl alkyl bromides and N-heterocycles for producing functionalized N-heterocycles, which is characterized by its exquisitely controllable regio-/stereo-selectivity and excellent tolerance of functional groups. Mechanistically, the formation of the carbonyl-coordinated
我们在此描述了一种新的,选择性的铟促进的银介导的1,3-二烯与α-羰基烷基溴化物和N-杂环的1,3-二烯间的分子间氧化1,4-烷基芳基化反应,以生产功能化的N-杂环,其特征在于其可控性很强区域/立体选择性和对官能团的优异耐受性。从机理上讲,羰基配位的η3-烯丙基-In复杂自由基中间体的形成是成功实现对1,4-双官能化和(E)-异构体的区域和立体选择性的关键因素。