Formation of 2,7-dioxa-5,10-diaza-3,8-diphospha-1,6(1,4)-dibenzenacyclodecaphane derivatives in the reactions of para-(N-benzylidene)aminophenol with monochlorophosphites

Iminophosphites, which are formed in the reactions of para-(N-benzylidene)aminophenol with diethyl and ethylene chlorophosphites by the formation of two new intermolecular P−C bonds with the participation of HCl evolved in the course of the reaction, are condensed to form 16-membered P-macrocycles, 2,7-dioxa-5,10-diaza-3,8-diphospha-1,6(1,4)-dibenzenacyclodecaphane derivatives.