Tetrahedron p. 16107 - 16114 (1997)
Update date:2022-08-31
Topics:
Jeandon, Christophe
Ocampo, Ruben
Callot, Henry J.
An improved hemisynthesis of DPEP from chlorophyll a is described. Hydrogenation of the vinyl group avoided the cleavage to a 3-H porphyrin, while heating in triazabicyolodecene performed the decarboxylation of the side-chain and the aromatization of ring D. Under these conditions extensive methylation and propylation of ring E occurred in the presence of CH2X2 (X = Cl, Br).
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