70556-92-2Relevant academic research and scientific papers
The first experimental demonstration of side chain extension of geoporphyrins in sediments
Asahina, Kenta,Asano, Junya,Kumagai, Gen,Satou, Mitsuru,Nomoto, Kouichi,Kashiyama, Yuichiro,Mita, Hajime,Nomoto, Shinya
body text, p. 1267 - 1269 (2011/02/16)
To investigate the formation process of high carbon number (>C 32) sedimentary porphyrins, heating experiments of several porphyrins were performed. Chromic acid oxidation of the heating products of protoporphyrin IX dimethyl ester afforded 2-methyl-3-npropylmaleimide as the predominant product among the side-chain extension products formed. On the other hand, saturated substituents of etioporphyrin were also extended on heating to slowly form normal and branched homologs. These results may suggest that the transalkylation of porphyrin side chains proceeds mainly by a regioselective mechanism involving alkyl radical addition to a vinyl group of chlorophylls or their diagenetic products.
