Abstract The reaction of aroyl [bis (4-hydroxycoumarin-3-yl)] methanes with 1, 2- phenylenediamines in Pr i OH is accompanied by the recyclization to 8-R-or 7-R-4-(2- hydroxyphenyl)-1, 5-benzodiazepin-2-ones, whereas the reaction with o-phenylenediamine and its 4-methyl-substituted derivatives in MeOH produces organic ionic salts of the bis- coumarin anion with monoprotonated o-phenylenediamine as the cation.
