Intramolecular, Reductive Cyclization of ?-Ketoisothiocyanates Promoted by Using Samarium Diiodide
作者:Min Seok Cho、In Sang Lee、Sung Ho Kang、Yong Hae Kim
DOI:10.1002/chem.200400676
日期:2005.2.18
A novel samariumdiiodide (SmI2) promoted intramolecular cyclization of beta-ketoisothiocyanate, derived from alpha,beta-unsaturated esters and ammonium thiocyanate led to alpha-hydroxythiolactams and/or thiolactams in high yields. Treatment of beta-ketoisothiocyanate with two equivalents of SmI2 gave a mixture of alpha-hydroxythiolactam and thiolactam. Four equivalents of SmI2 afforded only thiolactam