A New Method for the Preparation of 2-Thio Substituted Furans by Methylsulfanylation of γ-Dithiane Carbonyl Compounds
作者:Albert Padwa、Cheryl K. Eidell、John D. Ginn、Michael S. McClure
DOI:10.1021/jo010986a
日期:2002.3.1
a thionium ion from a gamma-dithianyl substituted carbonylcompound followed by cyclization of this reactive intermediate onto the tethered carbonyl group. Two methods for thionium ion generation were explored. One of these involved an acid-catalyzed reaction of beta-ketenedithioacetals, prepared from the condensation of 2,2-bis(methylsulfanyl)acetaldehyde with a variety of ketones. Cyclization followed