A new methodology based on the '3+ 1'acid-catalytic condensation of tripyrranes and pyrrole- 2, 5-dicarbaldehyde has been used, for the first time, for the synthesis of two types of porphyrins:-dipropionic ester porphyrins 30 and 31 including an analogue of the corallistin-A and-diacrylic ester porphyrins 32 and
