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pubmed-article:12237540pubmed:issue9lld:pubmed
pubmed-article:12237540pubmed:dateCreated2002-9-18lld:pubmed
pubmed-article:12237540pubmed:abstractTextThe synthesis and structure-activity-relationship (SAR) for a series of N-substituted piperazinyl carbamoyl 7-15 and piperazinyl acetyl 18-26 derivatives of tetrahydropapaverine have been carried out. The general synthetic methods of carbamoyl tetrahydropapaverine analogues involve N-substituted piperazines and carbamoyl imidazole tetrahydropapaverine as starting materials. Another route for synthesizing these compounds, involving the formation of carbamoyl imidazole piperazine has also been explored. Acylation of tetrahydropapaverine followed by substitution with various piperazinyl moities afforded the acetyl tetrahydropapaverine derivatives. Variously substituted piperazines have been used to monitor the effect of electron releasing and electron withdrawing substituents upon the antispasmodic activity of the molecules. Effect of varying electron densities on the antispasmodic activity, by altering the position of these groups on the benzene ring has also been monitored. Pharmacological methods involve the in vitro antispasmodic activity studies on a freshly removed guinea pig ileum using a force displacement transducer amplifier connected to a physiograph. Among the analogues synthesized in the present study, a promising compound 7, a potent muscle relaxant as compared to papaverine has been obtained.lld:pubmed
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pubmed-article:12237540pubmed:authorpubmed-author:ChandraRamesh...lld:pubmed
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pubmed-article:12237540pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:12237540pubmed:articleTitleSynthesis of N-substituted piperazinyl carbamoyl and acetyl derivatives of tetrahydropapaverine: potent antispasmodic agents.lld:pubmed
pubmed-article:12237540pubmed:affiliationDr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, India.lld:pubmed
pubmed-article:12237540pubmed:publicationTypeJournal Articlelld:pubmed
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pubmed-article:12237540pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed