Macroheterocycles with an endocyclic azo-group. 1. Tetraazamacrocycles obtained from resorcinol

High-dilution azocoupling of bisdiazotized bis-(2-aminophenyl)oligooxa (orthia)alkanes with resorcinol gives tetraazamacrocycles with two endocyclic azo-groups. It is shown that azocoupling occurs exclusively at the 2- and 4-positions of the resorcinol ring.