A Metal-Free Synthesis of 2-Alkyl(or Aryl) Thiomethyl-2-cyclohexenones from Cyclic<i>Morita</i>-<i>Baylis</i>-<i>Hillman</i>Bromides
作者:Narjes Baioui、Ahlem Abidi、Farhat Rezgui
DOI:10.1002/hlca.201600136
日期:2016.9
catalyst or an expensive additive is described herein. Treatment of the MBH bromides with various thiols or ethane‐1,2‐dithiol in the presence of Et3N regioselectively affords the corresponding 2‐alkyl(or aryl) thiomethyl‐2‐cyclohexenones or the perhydro benzo[1,4]dithiepinone, respectively, in moderate to good yields (40 – 73%). The reaction is rapid and carried out in THF at room temperature.
在温和的条件下,本文描述了巯基与环状森田-贝利斯-希尔曼(MBH)溴化物的高效快速S-烯丙基化,无需过渡金属催化剂或昂贵的添加剂。在Et 3 N存在下,用各种硫醇或乙烷-1,2-二硫醇对MBH溴化物进行区域选择性处理,可得到相应的2-烷基(或芳基)硫代甲基-2-环己酮或全氢苯并[1,4]二噻吩酮,分别以中等至良好的产量(40 – 73%)。该反应是快速的,并且在室温下在THF中进行。