Sam H. Leung

A novel biliverdin with an inverted pyrrole subunit

Abstract The synthesis and spectroscopic properties of a novel biliverdin 4 with one inverted pyrrole ring are described; the dipyrromethane 8 and a,c-biladiene 6 were the key intermediates in the synthesis of 4 .

The polymer-supported MacDonald-type porphyrin synthesis: coupling of two dissimilar dipyrromethanes

Abstract Syntheses of two completely unsymmetrical porphyrins have been achieved by MacDonald-type condensations of polymer-bound 9-formyldipyrromethanes with dissimilar solution-phase dipyrromethanes. The chemoselectivity of the process depends on the nature of the substituents at the α positions of the substrates.

Total synthesis of new porphyrins isolated from the coral sea demosponge corallistes sp.

Three new metal-free porphyrins, corallistin B, corallistin C and corallistin E isolated from the demosponge Corallistes sp. were synthesized as methyl esters in excellent yield by using either the MacDonald or a,c-biladiene routes to porphyrins.