Enamine chemistry. Part VII. Synthesis and structure of dienamines of 3-alkyl-5,5-dimethylcyclohex-2-enones. Factors affecting the formation and relative stability of exo- and endo-cyclic diene systems
Abstract
Several 3-alkyl-5,5-dimethylcyclohex-2-enones have been prepared and have been shown to give only linear conjugated dienamines. The 1H n.m.r. spectra of the dienamines are reported and the factors which affect the endo-exo-cyclic ratio are discussed.