作者:Miros?aw J. Tomaszewski、John Warkentin
DOI:10.1039/c39930000966
日期:——
6-endo Cyclization of aryl radicals to carbon of aldimino double bonds (N-5/C-6) in chiral ortho-substituents afforded 1,2,3,4-tetrahydroisoquinolines in yields to 69%, with 58% d.e. and 97% e.e., while 5-exo Cyclization to carbon in isomeric radicals (C-5/N-6 aldimine), leading to indanamines, was highly regioselective and fast, k5-exo= 3.9 × 108s–1 at 80 °C.
在手性正交取代基中,芳基与醛亚氨基双键(N-5/C-6)的碳发生 6-endo 环化反应,得到 1,2,3,4-四氢异喹啉,产率为 69%,d.e.为 58%,e.e.为 97%、而异构自由基(C-5/N-6 醛亚胺)中碳的 5-exo 环化生成茚满胺的过程具有高度的区域选择性且速度极快,在 80 °C 时 k5-exo= 3.9 × 108s-1。