An Efficient Route to Vinylporphyrins
Yon-Hin, P., Wijesekera, T. and David Dolphin
Can. J. Chem.,
The use of 1-bromo-19-methylbiladienes-ac in the synthesis of vinylporphyrins is described. The effect of the vinyl precursors on the reactions of the dipyrromethene intermediates and the construction of the linear tetrapyrrole are discussed. High-yield syntheses of a methylvinylporphyrin, an H-vinyl analog, as well as two A,C-divinyl-porphyrins are presented.