Nonconventional Friedel-Crafts Chemistry. VIII. On the Preferentional Intramolecular Cyclization Reactions of 2-Aryl-2-benzyl-1,3-oxathiolan-5-one under Lewis Acids Catalytic Action
In our previous work we reported the intermolecular reactions of spirothialactones with arenes, ferrocene and thiophene. The results of these investigation together with our interest in Friedel-Crafts chemistry prompted us to consider the intramolecular cyclization reactions of 2-aryl-2-benzyl-1,3-oxathiolan-5-one derivatives ( IIa - IId ) under Lewis acid catalyst effect.