Indium(III) chloride catalyzed one step synthesis of some new dibenzo(d,f)(1,3)dioxepines and 12H-dibenzo(d,g)(1,3)dioxocin derivatives

TOCCO, GRAZIELLA;BEGALA, MICHELA;DELOGU, GIOVANNA LUCIA;PICCIAU, MARIA CARMEN;PODDA G.

2004-01-01

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Abstract

In the presence of catalytic amount of indium(III) chloride (10mol%), 2,20-dihydroxybiphenyl and bis(2-hydroxyphenyl) methane react quickly, without using any solvent, with ketones or b-keto esters possessing at least one hydrogen atom in a to the ketone-carbonyl group, to afford some new dibenzo(d,f)(1,3)dioxepinesand some 12H-dibenzo(d,g)(1,3)dioxocin derivatives, respectively.