Dienolate 11, which was produced from 3-methyl-2-phenylthio-2-butenoic acid (1) and two equivalents of LDA, reacted with aldehydes or ketones to give 5-alkyl-3-methyl-2-phenylthio-2-penten-5-olides (12) in good yields.
二烯酸酯 11 由 3-甲基-2-苯
硫基-
2-丁烯酸(1)和两当量的
LDA 生成,与醛或酮反应生成 5-烷基-3-甲基-2-苯
硫基-
2-戊烯-5-醇(12),产率良好。