Structural determination of purpurin-18 (as methyl ester) from sedimentaryorganic matter

Authors
Ocampo, R Repeta, DJ
Citation
R. Ocampo et Dj. Repeta, Structural determination of purpurin-18 (as methyl ester) from sedimentaryorganic matter, ORG GEOCHEM, 30(2-3), 1999, pp. 189-193
Citations number
22
Categorie Soggetti
Earth Sciences
Journal title
ORGANIC GEOCHEMISTRY
ISSN journal
01466380 → ACNP
Volume
30
Issue
2-3
Year of publication
1999
Pages
189 - 193
Database
ISI
SICI code
0146-6380(1999)30:2-3<189:SDOP(M>2.0.ZU;2-P
Abstract
We report the isolation and structural determination (RP-18 HPLC, UV-VIS, M S, H-1 NMR and two-dimensional H-1 NMR (COSY and ROESY)) of purpurin-18 (as methyl ester) from geological samples. Existing data suggest that purpurin s-18 are derived from chlorophyll or its transformation products by postdep ositional, microbially mediated processes in sediments. Diagenetic transfor mations of purpurins-18 can lead through fossilization to pyrroporphyrins a nd some ETIO porphyrins isolated from sediments. (C) 1999 Elsevier Science Ltd. All rights reserved.