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Communication | Regular issue | Vol 29, No. 12, 1989, pp.2257-2260
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5168
Unambiguous Carbon-13 NMR Assignments of Some Biologically Active Protoberberine Alkaloids

Raouf A. Hussain, Jinwoong Kim, Christpher W. W. Beecher, and A. Douglas Kinghorn*

*Program for Collaborative Research in the Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, 833 South Wood St., Chicago, IL 60612-7231, U.S.A.


Unambiguous proton and carbon-13 nmr chemical shifts of the protoberberine quaternary alkaloids palmatine (1) and jatrorrhizine (2) theilr, tetrahydro derivatives (3,4), and tetrahydroberberine (5) have been determined through the use of 2D, CSCM 1D and selective INEPT nmr techniques.