Synthesis of ?-alkoxy-?, ?-dicarbonyl-substituted dienes and study of their valence isomerization
作者:Zh. A. Krasnaya、T. S. Stytsenko、V. S. Bogdanov
DOI:10.1007/bf00958845
日期:1990.11
Methods of synthesis of dienic delta-alkoxy-alpha, alpha-dicarbonyl-substituted compounds were experimentally examined. The structure of the synthesized compounds was studied by H-1 and C-13-NMR methods. It was shown that the delta-alkoxy diesters are present in equilibrium with 2H-pyrans, while delta-alkoxy-gamma-methyl diesters and 2-(3'-alkoxypropen-2'-ylindene)indanediones exist in an open form and do not undergo cyclization into 2H-pyrans.