A short conversion of cyclohexanones to cycloheptenones
作者:Shangjin Yang、Benno Hungerhoff、Peter Metz
DOI:10.1016/s0040-4039(98)00298-6
日期:1998.4
Cycloheptenones are efficiently prepared from cyclohexanones via organoaluminum-promoted ringenlargement with trimethylsilydiazomethane and subsequent palladium(II)-catalyzed dehydrosilylation.
Enantioselective Synthesis of the Hydroazulene Core of 3α-Hydroxy-15-rippertene
作者:Thomas Kreuzer、Peter Metz
DOI:10.1002/ejoc.200700904
日期:2008.1
As part of a project directed toward the total synthesis of the tetracyclic diterpene 3α-hydroxy-15-rippertene, a constituent of the defense secretion of higher termites, a fast access to two advanced hydroazulene key intermediates has been achieved by starting from (–)-isopulegol. A regio- and diastereoselective formal hydromethallylation and a regioselective ring expansion served as the key steps