A NOVEL METHOD FOR CYCLOPENTANNELATION USING REGIOSELECTIVE ACYLATION OF ALLYLIC SULFIDES VIA α-SILYL INTERMEDIATES
作者:Kunio Hiroi、Hiroyasu Sato、Kumiko Kotsuji
DOI:10.1246/cl.1986.743
日期:1986.5.5
An aluminum chloride-catalyzed reaction of 1-(phenylthiotrimethylsilylmethyl)cyclohexene, readily obtainable from cyclohexanone, with acid chlorides in dichloromethane underwent a regioselective acylation at the γ-Position of the allylic system to give γ-acyl enol thioethers in good yields. Heating of these enol thioethers with an equimolar amount of p-toluenesulfonic acid produced 2-cyclopentenone
氯化铝催化的 1-(苯基硫代三甲基甲硅烷基甲基)环己烯(容易从环己酮获得)与酰氯在二氯甲烷中的反应在烯丙基体系的 γ 位进行区域选择性酰化,以良好的产率得到 γ-酰基烯醇硫醚。将这些烯醇硫醚与等摩尔量的对甲苯磺酸加热产生 2-环戊烯酮衍生物。这种用于环戊烯化的新方法为 2-环戊烯酮环系统提供了新的入口。