Mukaiyama-Michael reaction of cyclic ketene silyl acetals and enones. Importance of ring flexibility in electron transfer process
作者:Yukihiro Fujita、Shunichi Fukuzumi、Junzo Otera
DOI:10.1016/s0040-4039(97)00321-3
日期:1997.3
Michael reaction of macrocyclic ketene silyl acetals or α-enones occurs smoothly under electron transfer conditions while the reaction of 6-membered analogs is more sluggish, indicating the importance of the ring flexibility to allow the α,β-carbon-carbon bonds of both reaction components to rotate when the radical species are generated.
大环烯酮甲硅烷基乙缩醛或α-烯酮的迈克尔反应在电子转移条件下平稳发生,而6-元类似物的反应更缓慢,这表明环柔性对于允许两个反应的α,β-碳-碳键的重要性产生自由基的组分旋转。