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Synthesis and structure elucidation of a new isoquinolinium inner salt

✍ Scribed by Ulrich Girreser; Andrzej Czyrski; Tadeusz W. Hermann

Publisher: Elsevier Science
Year: 2009
Tongue: French
Weight: 229 KB
Volume: 50
Category: Article
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2009.05.099

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✦ Synopsis

Papaverine is a drug that can be easily oxidized to papaverinol, papaveraldine and to recently discovered 2,3,9,10-tetramethoxy-12-oxo-12H-indolo[2,1-a]isoquinolinium chloride. In a strong alkaline medium the spectroscopic properties of this latter compound are modified indicating formation of a new compound. The isolation and structure elucidation of this compound as 2-(2-carboxy-4,5-dimethoxyphenyl)-6,7-dimethoxyisoquinolinium inner salt are reported.

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