Phosphorus(V) tetrapyrazinocorrolazines — first corrolazine derivatives with fused heterocyclic rings

Abstract

Tetrapyrazinocorrolazines — first corrolazine derivatives with annulated heterocycles — have been prepared as phosphorus(V) complexes by the reaction of metal free tetrapyrazinoporphyrazines [( R 8 TPyzPA ) H 2] (R = Ph, Me) with phosphorus(III) chloride or bromide in pyridine. Oxophosphorus(V) complexes [( R 8 TPyzCA ) P = O ] were obtained when the reaction mixture was poured into water, while dilution with methanol leads to dimethoxyphosphorus(V) complexes [( R 8 TPyzCA ) P ( OMe )2]. The obtained compounds were characterized by MALDI-TOF mass-spectrometry and by IR, 1 H , 31 P NMR measurements. Their UV-vis spectral and basic properties in CH 2 Cl 2– CF 3 COOH medium were studied in comparison to phosphorus(V) complex of octaphenylcorrolazine [( Ph 8 CA ) P = O ].