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 analogue, as well as two A,C-divinylporphyrins are presented. Keywords: pyrrole, dipyrromethene, acetoxyethylpyrrole