13C-NMR Spectra and Streochemistry of Isoechinulins A, B and C
- 1 August 1979
- journal article
- research article
- Published by Oxford University Press (OUP) in Agricultural and Biological Chemistry
- Vol. 43 (8) , 1759-1763
- https://doi.org/10.1080/00021369.1979.10863681
Abstract
13C-NMR spectra of isoechinulins A, B and C, metabolites from Aspergillus ruber, were fully assigned on the basis of chemical shifts and multiplicities and comparison with their analogues. Taking advantage of the symmetrical structure of the diketopiperazine ring, the stereochemistry of the trisubstituted carbon-carbon double bond in a dehydrotryptophyl moiety was determined as Z (cis) by measuring the coupling constants, , in the proton nondecoupled spectrum of isoechinulin B.This publication has 1 reference indexed in Scilit:
- The structures of five new didehydropeptides related to neoechinulin, isolated from Aspergillus amstelodamiJournal of the Chemical Society, Perkin Transactions 1, 1977