Synthesis of 2(5<i>H</i>)-Furanones via Oxidative Ring Expansion of 4-Hydroxy-2-cyclobutenones
作者:Norbert De Kimpe、Guido Verniest
DOI:10.1055/s-2005-864805
日期:——
A new method to reduce cyclobutenediones towards 4-hydroxy-2-cyclobutenones was established. The latter compounds gave rise to new 5-halo-2(5H)-furanones by reaction with halogenating agents via a cationic ring-opening-ring-closure mechanism.