Abstract
A chemoselective aminolysis of the β-keto ester of pheophorbide a methyl ester is demonstrated opening a facile access to an asymmetric amide functionalization of a chlorin ring using a range of aromatic and aliphatic, primary and secondary amine nucleophiles. Aminolysis of pheophorbide a methyl ester with trans-1,2-diaminocyclohexane is shown to give a symmetric open face chlorin dimer.
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