Regioselective Entry to Bromo-γ-hydroxybutenolides: Useful Building Blocks for Assemblying Natural Product-Like Libraries
作者:M. Aquino、I. Bruno、R. Riccio、L. Gomez-Paloma
DOI:10.1021/ol0618611
日期:2006.10.1
[reaction: see text] We report a regioselective entry to 3-bromo- and 4-bromo-5-hydroxy-5H-furan-2-ones by photooxidation of 3-bromofuran with a singlet oxygen in the presence of a suitable base. By this procedure, a variety of 3-substituted gamma-hydroxybutenolides have become for the first time easily accessible. Strategies employing these highly functionalized building blocks for the preparation