On the chemistry of pyrrole pigments, LXXXIX: Vinylogous linear di- and tetrapyrroles

摘要

A vinylogous dipyrrinone, its Ehrlich aldehyde condensate, and the vinylogous bilindione derived from the vinylogous dipyrrinone were prepared. Their structural aspects of tautomerism, configuration and conformation were derived by analysis of their1H-NMR data. Selected physical properties were determined and are discussed.