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Communication | Regular issue | Vol 20, No. 5, 1983, pp.775-778
Published online, 1st January, 1970
DOI: 10.3987/R-1983-05-0775
Non-oxidative Photocyclization of 2-Aroyl-1-methylene-1,2,3,4-tetrahydroisoquinolines

Takeaki Naito, Kotomi Katsumi, Yukiko Tada, and Ichiya Ninomiya

*Kobe Women’s College of Pharmacy, Motoyamakita, Higashinad, kobe, Hyogo 658, Japan

Abstract

Non-oxidative photocyclization of the enamides (2c,d,e) in benzene at low temperature afforded a new type of the lactams (4c,d,e) and (8) which have a common dihydrobenzene moiety and were readily transformed into the corresponding dehydrolactams (5c,d,e) and (7), thus firmly established the reaction course of photocyclization of these enamides under non-oxidative condition.