以3,4-二溴环戊砜(1)为原料,在无水吡啶作用下发生消除反应,得到反应中间体4-溴-2-环戊烯砜(2),再与水杨酸钠(3)在水溶液和DMF中发生酯化反应,合成水杨酸酯环戊烯砜衍生物(4),用IR,^1H NMR,MS,元素分析表征了它们的结构,并讨论了酯化反应在在水溶液和DMF中的最佳反应条件。结果表明:水溶液中的酯化反应后处理更加简单,产率最高。
3,4-dibromosulfolane (1) was treated with pyridine to form 4-bromo-2-sulfolene (2) by elimination reaction 4-bromo-2-sulfolene 2 reacted with sodium salicylate (3), gave a allylic substitution products (4) by esterification reaction, respectively. The compound (4) were determined by IR, ^1H NMR, MS and elemental analysis. The best conditions of esterification in different solvent were discussed. It was found that the post-processing of esterification in water was more convenient than in DMF, and the yield of the esterification in water was better than the esterification in DMF.