An example of the base induced isomerisation of the epoxide ring in enolizable epoxyketones: isomerisation of 8,9-epoxy-6,7,8,9-tetrahydro-5H-benzocyclohepten-5-one and some of its derivatives
作者:Zofia Kotkowska-Machnik、Janusz Zakrzewski
DOI:10.1016/s0040-4039(00)71495-x
日期:1980.1
The title compounds in the basic medium (RO−/ROH) afford an unique example of competition between isomerisation via the enolate anion and epoxide-ketone isomerisation.
1,4-Dienes were prepared by the homo-1,4-elimination of αα′-dihydroxy derivatives of cyclopropanes with diphosphorustetraiodide in the presence of pyridine.