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■ Acid-catalyzed Photoreaction of 6-Chloro-1,3-dimethyluracil in Benzene; Synthesis of Cyclooctapyrimidine-2,4-dione

Koh-ichi Seki,* Nobuhiko Kanazashi, and Kazue Ohkura

*Faculty of Pharmaceutical Sciences, Higashi-Nippon-Gakuen University, Ishikari-Tobetsu, Hokkaido 061-0293, Japan

Abstract

The photolysis of 6-chloro-1,3-dimethyluracil in benzene afforded 1,3-dimethyl-6-phenyluracil, while the photoreaction in the presence of trifluoroacetic acid afforded 1,3-dimethylcyclooctapyrimidine-2,4-dione as a major product.