Several 2-alkyl-3-amino-2-cyclopenten-1-ones are prepared in 45-92 % yield from 2-alkyl-1,3-cyclopentanediones and a slight excess of an equimolar mixture of various primary and secondary amines and acetic or propionic acid in boiling toluene.
Addition reactions of cyclic s-trans-enaminones with Grignard reagents.
作者:Thomas T. Shawe、Darren B. Hansen、Kelly Ann Peet、Anthony S. Prokopowicz、Patrice M. Robinson、Annatina Cannon、Kathleen E. Dougherty、Andrew A. Ross、Linda M. Landino
DOI:10.1016/s0040-4020(96)01133-7
日期:1997.2
Addition of Grignardreagents to s-trans-enaminones derived from 1,3-cycloalkanediones are described. In dichloromethane, addition of phenylmagnesium bromide gave 3-phenyl substituted cycloalkenones. Alkylmagnesium halides underwent multiple additionreactions, giving mixtures of the 3-alkylcycloalkenones and 1,3-dialkyl-3-(dialkylamino)cyclohexenes. In tetrahydrofuran, only the 3-alkylcycloalkenone