The type II photoelimination and cyclization reactions of a series of α-alkoxyacetophenones have been studied. Quantum yields and rate constants for product formation were determined in several solvents. The results contrast with those for aryl alkyl ketones in several notable respects. A comparison of the reactivity of alkyl and alkoxy hydrogens toward intramolecular abstraction by a carbonyl excited state was examined by study of the photolysis of α-methoxybutyrophenones. Effects of aromatic substituents on the reactivity of α-alkoxyacetophenones and butyrophenone were also investigated. The results are discussed in terms of the generally accepted mechanisms of type II photoelimination and cyclization.
ASJC Scopus subject areas
- Colloid and Surface Chemistry