Multiplicity dependence of di-π-methane photochemistry. Regiospecific formation of tetramethylvinylcyclopropanes and chrysanthemic acid derivatives
Abstract
Methyl 4,4,6-trimethylhepta-2,5-dienoate and 4,4,6-trimethylhepta-2,5-dienecarbonitrile form chrysanthemic acid derivatives on direct irradiation and tetramethylvinylcyclopropanes on irradiation in acetone.