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Isoquinoline alkaloids: a 15N NMR and x-ray study. Part 2

✍ Scribed by Radek Marek; Jaromír Marek; Jiří Dostál; Eva Táborská; Jiří Slavík; Roger Dommisse

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
285 KB
Volume
40
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Continuing our systematic ^15^N NMR study of isoquinoline alkaloids, we report a contribution extending our previous paper. The ^15^N NMR chemical shifts and ^15^N,^1^H 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 © 2002 John Wiley & Sons, Ltd.

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