β-polynitration of 5,10,15,20-tetrakis (2′,6′dichlorophenyl)porphyrins with HNO3 and Cu(NO3)2 on clay using microwave irradiation

An expeditious beta-polynitration of 5,10,15,20-tetrakis(2',6-dichlorophenyl) porphyrin, its Zn and Cu derivatives with montmorillonite K10-HNO3 and montmorillonite K10-Cu(NO3)(2) (claycop) under mild conditions using microwave irradiation in 72-95% yields has been described.