Abstract
Irradiation of o-alkylbenzaldehyde, i.e., o-methylbenzaldehyde and o-benzylbenzaldehyde gave the corresponding enoles, which gave dimethyl naphthalene-2, 3-dicarboxylates, 4-hydroxy-1-phenyl-1, 2, 3, 4-tetrahydronaphthalene-2, 3-dicarboxylic acid γ-lactones and phthalides by reaction with dimethyl acetylenedicarboxylate, maleic anhydride and oxygen, respectively.
