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Communication | Regular issue | Vol 22, No. 10, 1984, pp.2231-2235
Published online, 1st January, 1970
DOI: 10.3987/R-1984-10-2231
The Stereochemistry at C-13 for the Proaporphine-benzylisoquinoline Alkaloids

Inge Weiss,* Alan J. Freyer, Maurice Shamma, and Alejandro Urzúa

*Department of Chemistry, The Pennsylvania State University, York Campus, P1031 Edgecomb Avenue, York, Pennsylvania 17403, U.S.A.


Berberis actinacantha Mert. ex Schult. (Berberidaceae) has yielded the new proaporphine-benzylisoquinolines (+)-epiberbivaldine (13) and (+)-rupancamine (15). The first of these dimers belongs to the epi stereochemical series, while the second incorporates the normal stereochemistry at C-13.