Process for production of novel bis (benzamido)-benzene derivatives

Abstract From the Canadian patent

Disclosed herein three processes for producing novel bis(benzamido)-benzene derivatives having various pharmaceutical properties such as peptic ulcer-preventing and treating, peripheral vasodilating, hypotensive and analgesic activities and represented by the formula: (I), wherein X is a direct bond, oxygen -CONH- or , wherein R4 is lower alkyl; R1 is straight or branched lower alkylene; R2 and R3 are the same or different lower alkyls or are bonded to each other directly or through one or more heteroatoms or are bonded to R4; and Y and Z may be the same or different, and each are hydrogen lower alkyl, hydroxy, lower alkoxy, lower alknoyloxy or halogen.