Organocatalytic asymmetric Michael addition of 1-acetylcyclohexene and 1-acetylcyclopentene to nitroolefins
作者:Utpal Nath、Ankush Banerjee、Bidhan Ghosh、Subhas Chandra Pan
DOI:10.1039/c5ob00878f
日期:——
The first organocatalytic asymmetric Michael reaction between α-branched enones namely 1-acetylcyclohexene, 1-acetylcyclopentene and 1-acetylcyclobutene with nitroolefins has been developed using primary amines as catalysts.
octaline system is obtained from the reaction between 2-cyclohexenyl-1-morpholino-ethene and β-nitrostyrene, carried out under kinetic control. By hydrolysis, it is converted to a 1-decalone derivative, which is also a kinetic control product. The stereochemicalaspects of formation and equilibration of the products are examined.