Synthesis of deoxophylloerythroetioporphyrin (DPEP) and three ring homologs by an improved b-bilene methodology

Article abstract of DOI:10.1016/S0040-4039(98)01960-1

Deoxophylloerythroetioporphyrin, an important porphyrin molecular fossil from oil shales and petroleum, and three homologs with six-, seven- or eight- membered exocyclic rings have been prepared by a one pot cyclization of b- bilenes with TFA-trimethyl or