First intramolecular benzyne diels-alder reaction with an acyclic diene. Unusual effect of diene geometry on the course of the reaction
作者:Keith R. Buszek
DOI:10.1016/0040-4039(95)01980-v
日期:1995.12
The first intramolecular benzyne Diets-Alder reaction with an acyclic diene is reported. The course of the reaction is dependent on the diene geometry. Trans dienes afford [4+2] cycloadducts; cis dienes apparently give [2+2 ] cycloadducts followed by further rearrangement, a mechanistic course which is supported by deuterium labeling experiments.
据报道与无环二烯的第一个分子内苯甲醛-Diets-Alder反应。反应过程取决于二烯的几何形状。反式二烯提供[4 + 2]个环加合物;顺二烯显然产生[2 + 2]环加合物,然后进一步重排,这是氘标记实验所支持的机制。