Palladium catalysed termolecular queuing cascades. Facile cyclisation-anion capture routes to heterocyclic dienes via allene insertion processes
作者:Ronald Grigg、Vladimir Savic
DOI:10.1016/0040-4039(96)01400-1
日期:1996.9
Pd(0) catalysed termolecular queuing processes involving oxidative addition to aryl or vinyl halides followed by cyclisation onto a proximate alkyne, allene (1atm) insertion, and capture of the resulting π-allylpalladium(II) species by secondary amines affords 5–8 membered benzoannelated heterocyclic dienes or electrocyclisation products respectively in good yield.
Pd(0)催化的分子排队过程包括氧化成芳基或乙烯基卤化物,然后环化到最接近的炔烃上,丙二烯(1atm)插入,并通过仲胺捕获生成的π-烯丙基铝(II)物种,得到5-8元苯甲酰化的杂环二烯或电环化产物分别具有良好的收率。