SELECTIVE REACTIONS OF THIOLATE ANIONS WITH 4-HYDROXY-<i>E</i>-2-ALKENOIC ESTERS OR 4-METHANESULFONYLOXY-<i>E</i>-2-ALKENOIC ESTERS. SYNTHESIS OF 2-ALKEN-4-OLIDES (Δ<sup>α,β</sup>-BUTENOLIDES) AND<i>E</i>,<i>E</i>-2,4-ALKADIENOIC ESTERS
作者:Rikuhei Tanikaga、Yoshihito Nozaki、Kazuhiko Tanaka、Aritsune Kaji
DOI:10.1246/cl.1982.1703
日期:1982.11.5
Methyl 4-hydroxy-E-2-alkenoates prepared from aldehydes in one step, undergo the Michael reactions with thiolate anions to give 4-alkanolide derivatives, which are converted into 2-alken-4-olides. Methyl 4-methanesulfonyloxy-E-2-alkenoates undergo the substitution reactions, and subsequent treatments give methyl E,E-2,4-alkadienoates.
从醛类一步制备的甲基4-羟基-E-2-烯酸酯与硫醇阴离子发生迈克尔反应,生成4-烷烯内酯衍生物,这些衍生物转化为2-烯-4-内酯。甲基4-甲烷磺酰氧基-E-2-烯酸酯发生取代反应,随后处理得到甲基E,E-2,4-烯二烯酸酯。