6,12-Dimethylchrysene has been synthesised, by photo-oxidative cyclization of 2-methyl-l-[a-(4-methylnaphthyl)] -2-phenylethene. Similarly, irradiations of 2-methyl-l-[a-(4-methoxynaphthyl)]-2-phenylethene,2-cyanO-l-[a -(4-methylnaphthyl)]-2-phenylethane and 2-cyano-l-[a-(4-methoxynaphthyl)]2-phenylethene yielded 6-methoxy-12-methyl.6-cyano-12-methyl and 6-cyano-12methoxychrysenes respectively. No migration of substituents was observed.
I S AL SHIEBANI ,F S KAMOUNAH ,
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