Photolysis of 4-substituted-4-hydroxy-3-cyclobuten-1-ones: a new route to butenolides from 4-hydroxycyclobutenones
作者:Steven T. Perri、Lafayette D. Foland、Harold W. Moore
DOI:10.1016/0040-4039(88)85284-5
日期:1988.1
ring closure to provide butenolide products. This transformation is envisaged to involve a stereoselective disrotatory electrocyclic ring opening to the corresponding conjugated ketene in which the C4 hydroxyl group rotates inward towards the ketene moiety. Intramolecular trapping of the ketene moiety with the proximal hydroxyl group results in the corresponding butenolide products.
4-取代-4-羟基-3-环丁烯-1-酮的光解经历环电开环,然后闭环以提供丁烯内酯产物。设想该转化涉及向相应的共轭烯酮的立体选择性旋转环开环,其中C 4羟基朝着烯酮部分向内旋转。用近端羟基将烯酮部分分子内捕获产生相应的丁烯内酯产物。