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

摘要

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