A facile synthesis of alkylidenebutenolides via thermal rearrangement of benzisoxazolequinones
作者:Tomás Torres、Wolfram Schäfer
DOI:10.1016/s0040-4039(00)93566-4
日期:1991.10
Benzisoxazolequinones 1 readily accesible from 2-carboxy-1,4-hydroquinone undergo thermic induced highly stereoselective rearrangement in solution to produce quantitatively gamma-cyanomethylidenebutenolides 2.