Pyrroles and related compounds. Part XIV. The structure and transformations of oxophlorins (oxyporphyrins)

摘要: Blue oxophlorins are relatively strong bases and accept one proton (on nitrogen) to form green monocations; addition of a second (to the oxo-group) occurs in strongly acidic media afford dications derived from tautomeric hydroxyporphyrins. Oxophlorins also metal complexes hydroxy-porphyrin structure, these compounds fairly acids. Several alkyl acyl derivatives hydroxyporphyrin structure described. The ferrichloride complex oxophlorin has been degraded glaucobilin-IX β- dimethyl ester through pure verdohaemin.