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■ Photoaddition of Vinyl Ethers to N-Methylphtalimide. Competing 2+2 Processes

Paul H. Mazzocchi,* Saeko Minamikawa, and Michael Bowen

*Department of Chemistry, University of Maryland, College Park, Marykland 20742, U.S.A.

Abstract

The photochemical addition of vinyl alkyl ethers to N-methylphthalimide to give 3,4-benzo-6,7-dihydro-1-methylazepine-2,5-diones in a Π² + σ² process is found to compete with the Π² + Π² Paterno-Buchi reaction in this system.