Asymmetric induction in Manganese(III)-based oxidative free-radical cyclizations of chiral esters and amides
作者:Barry B. Snider、Qingwei Zhang
DOI:10.1016/s0040-4039(00)61089-4
日期:1992.9
Mn(III)-based oxidative free-radical cyclizations of phenylmenthyl acetoacetate 1d affords 90% of 11 with 86% de. trans-2-Phenylcyclohexyl ester 1e affords 5e with only 60% de. The 2,5-dimethylpyrrolidine amide 1h affords 14 with higher de (92%), but in only 28% yield.
乙酰薄荷基乙酸薄荷酯1d的基于Mn(III)的氧化自由基环化反应得到90%的11和86%的de。反式-2-苯基环己基酯1e得到的de只有60%的5e。2,5-二甲基吡咯烷酰胺1H,得到14具有较高的德(92%),但在仅28%的产率。