Regio- and stereoselectivity in the cyclization of enolates derived from 4,5-, 5,6-, and 6,7-epoxy-1-phenyl-1-alkanones. Competition between C- and O-alkylation
作者:Paolo Crotti、Valeria Di Bussolo、Lucilla Favero、Franco Macchia、Mauro Pineschi、Elio Napolitano
DOI:10.1016/s0040-4020(99)00226-4
日期:1999.4
The results obtained in the base-catalyzed intramolecular cyclization of enolates derived from some representative 4,5-, 5,6-, and 6,7-epoxy ketones and of the corresponding alkenes are discussed. The LHMDS/Sc(OTf)3 protocol on epoxy ketones appears to be a valuable tool for the stereoselective obtainment of the corresponding cyclic γ-hydroxy ketones (γ-HKs).
讨论了在碱催化的分子内环化衍生自一些代表性的4,5-,5,6-和6,7-环氧酮和相应烯烃的烯醇化物中获得的结果。关于环氧酮的LHMDS / Sc(OTf)3方案似乎是立体选择获得相应的环状γ-羟基酮(γ-HKs)的有价值的工具。