Photoreaction of 2-Aryl-4-methylpent-2-enenitrile Giving 1-Aryl-1-cyano-2,2-dimethylcyclopropane. The Substituent Effect of 1,2-Hydrogen Migration
The photorearrangement of 2-aryl-4-methylpent-2-enenitriles to arylcyclopropanes is discussed on the basis of substituent effect.The efficiency of 1,2-hydrogen migration is independent from an electronic effect of the substituent and correlated to the singlet energy of excited molecule.