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Synthesis of C-13-Alkylated 8-oxoberberbines

URN to cite this document:
urn:nbn:de:bvb:355-epub-157339
Weimar, C. ; Angerer, S. von ; Wiegrebe, Wolfgang
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Date of publication of this fulltext: 08 Jul 2010 05:11


Abstract

C-13-alkylated methoxy-8H-dibenzo[a,g]quinolizin-8-ones 2a-e were synthesized by photocyclization of 1 -alkylidene-N-benzoyl-1,2,3,4-tetrahydroisoquinolines 1. Moreover, condensation of 1,2,3,4-tetrahydro-6,7-dimethoxy- 1-oxo-isoquinoline with homophthalic acid anhydrides 7a and b leads to the C-13-alkylated 8-oxoberbines 2b and c and improves the yields compared with those of the ...

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