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A two-dimensional NMR strategy for the complete 1H chemical shift assignment of extended proton spin systems in triterpenoids

✍ Scribed by Duraikkannu Loganathan; Girish K. Trivedi; K. V. R. Chary

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 505 KB
Volume: 28
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260281104

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✦ Synopsis

Abstract

An assignment strategy that utilizes one‐dimensional lanthanide‐induced methyl proton shifts, reported ^13^C NMR data of model compounds and two‐dimensional ^1^H and ^13^C shift correlated spectroscopy, homonuclear proton chemical shift correlated spectroscopy and nuclear Overhauser enhancement spectroscopy methods was demonstrated to be effective for the complete ^1^H chemical shift assignments of extended proton spin‐systems in a triterpenoid viz., 3‐keto‐urs‐12‐en‐24‐oic acid methyl ester. Complete ^13^C chemical shift assignments have also been accomplished.

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