Radical Cyclization in Heterocycle Synthesis. Part 10: A Concise Synthesis of (−)-Kainic Acid via Sulfanyl Radical Addition–Cyclization–Elimination Reaction
作者:Okiko Miyata、Yoshiki Ozawa、Ichiya Ninomiya、Takeaki Naito
DOI:10.1016/s0040-4020(00)00579-2
日期:2000.8
Sulfanyl radical addition–cyclization–elimination of diallylamines in the presence of thiophenol and AIBN gave the 2,3,4-trisubstituted pyrrolidine in high yield. This reaction was extended to a radical cyclization using a catalytic amount of thiophenol. A successful application was demonstrated by the asymmetric synthesis of (−)-kainic acid.
在硫酚和AIBN的存在下,亚硫烷基的加成-环化-消除二烯丙基胺可高产率地得到2,3,4-三取代的吡咯烷。该反应使用催化量的苯硫酚进行自由基环化反应。(-)-海藻酸的不对称合成证明了成功的应用。