The reaction of enols with superoxide anion radical [02???]1. Synthesis of 2,3-unsaturated-δ-valerolactones.
作者:Aryeh A. Frimer、Pessia Gilinsky-Sharon、Gladis Aljadeff
DOI:10.1016/s0040-4039(00)87089-6
日期:1982.1
4-Hydroxycoumarin ( and ) as well as 2-hydroxy-2,5-cyclohexadien-1-ones – were reacted with KO2/18-crown-6 in benzene. Initial deprotonation of the enol hydrogen was followed by nucleophilic attack by O2/t- (for and ) and/or autoxidation of the resulting anion (for and –). A convenient synthesis of 2,3-unsaturated-δ-valerolactones from the corresponding 2-cyclohexen-1-ones is also described.
3-和4-羟基香豆素(和)以及2-羟基-2,5-环己二烯-1-酮-用KO反应2 / 18-冠-6苯。烯醇氢的初始去质子化之后是O 2 / t-(对于和)的亲核攻击和/或所得阴离子的自氧化(对于和- )。还描述了由相应的2-环己烯-1-酮方便地合成2,3-不饱和-δ-戊内酯。