Dibenzothiophenes and related compounds. IV. Reactions of 5-substituted 10,11-dihydrodibenzo(b,f)thiepinium salts with aryllithiums.

Abstract

5-Substituted 10, 11-dihydrodibenzo [b, f] thiepinium salts were synthesized in order to elucidate the mechanism of reactions between acyclic triarylsulfonium salts and organolithiums. The reaction of aryllithiums with 5-substituted 10, 11-dihydrodibenzo [b, f] thiepinium salts has been investigated to get the results, as shown in Table I. The mechanisms for the formation of all products of the runs in Table I have been clearly explained as shown in Chart 3.