Photocyclization of Styrylbenzo[a]quinolizinium Salts. Part 3. Novel Five-Membered Ring Formation by Oxidative Photocyclization of 4-(2-Arylvinyl)benzo[a]quinolizinium Salts.

Novel five-membered ring formation by ox

Novel five-membered ring formation by oxidative photocyclization of 4-(2-arylvinyl)benzo[a]quinolizinium salts

✍ Sadao Arai; Hiroe Yoda; Kiyoshi Sato; Takamichi Yamagishi 📂 Article 📅 2002 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 47 KB

## Abstract Oxidative photocyclization of 4‐(2‐arylvinyl)benzo[__a__]quinolizinium salts (**6**) gave five‐ or six‐mem‐bered rings depending on the aryl substituent. The olefins **6a** and **6b** with a phenyl or naphthyl substituent resulted in a normal six‐membered ring formation to afford 6a‐azo