Title
Isoquinoline alkaloids : <tex>$a^{15}N$</tex> NMR and x-ray study. Part 2
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Chichester ,
Subject
Chemistry
Source (journal)
Magnetic resonance in chemistry. - Chichester
Volume/pages
40(2002) :11 , p. 687-692
ISSN
0749-1581
ISI
000178816300002
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Continuing our systematic N-15 NMR study of isoquinoline alkaloids, we report a contribution extending our previous paper. The N-15 NMR chemical shifts and N-15,H-1 long-range coupling pathways of tertiary and quaternary isoquinoline alkaloids of several constitutional types are presented. The selected compounds belong to the protoberberine, proaporphine, pavinane, rhoeadine and phtalideisoquinoline classes of alkaloids and were investigated by gradient-selected inverse-detected multiple bond correlation experiments (GHMBC and GSQMBC). In addition, x-ray data and the principal geometric parameters of stylopine, mecambridine, norchelerythrine, isothebaine and mecambrine are reported and discussed. Copyright (C) 2002 John Wiley Sons, Ltd.
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