Epoxidation of Electron Deficient Alkenes Using <i>tert</i>-Butyl Hydroperoxide and 1,5,7-Triazabicyclo[4.4.0]dec-5-ene and its Derivatives
作者:Thorsten Genski、Gregor Macdonald、Xudong Wei、Norman Lewis、Richard J. K. Taylor
DOI:10.1055/s-1999-2721
日期:1999.6
The title cyclic guanidine (4a) is an efficient promoter of enone epoxidation by tert-butyl hydroperoxide. Optimisation studies are reported and the procedure applied to cyclic and acyclic ketones, quinones and naphthoquinones. N-Substituted guanidine (4c) proved best for the epoxidation of 2-amidobenzoquinones. Preliminary asymmetric epoxidation studies are also discussed.