Selective and potent .beta.2-adrenoceptor agents within the tetrahydroisoquinoline class: effect of methyl substitution at the benzylic carbon of the 1-(3,4,5-trimethoxybenzyl) group of trimetoquinol
| Autor: | Dennis R. Feller, E. H. Fairchild, John W. Fowble, Duane D. Miller, A. Mukhopadhyay, J. Chang, D. J. Sober |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
Adrenergic receptor
Stereochemistry Guinea Pigs In Vitro Techniques Beta-1 adrenergic receptor chemistry.chemical_compound Heart Rate Drug Discovery Animals Beta (finance) Receptor Dose-Response Relationship Drug Chemistry Tetrahydroisoquinoline Diastereomer Heart Muscle Smooth Adrenergic beta-Agonists Isoquinolines Myocardial Contraction Trachea NMR spectra database Molecular Medicine Tretoquinol Selectivity Muscle Contraction |
| Zdroj: | Journal of Medicinal Chemistry. 24:970-974 |
| ISSN: | 1520-4804 0022-2623 |
| DOI: | 10.1021/jm00140a011 |
| Popis: | A systematic series of methyl (2 and 3) and dimethyl (4) analogues of trimetoquinol (1) were synthesized and evaluated for their beta 1 (atria) and beta 2 (trachea) and adrenoceptor activities. Structural assignments for the erythro (2) and the threo (3) diastereoisomers of 1-(3,4,5-trimethoxy-alpha-methylbenzyl)-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline were based on NMR spectra of the 6,7-dibenzyl precursors 15 and 16, respectively, and on the synthetic derivatives of cis- and trans-13-methyl-2,3-bis(benzyloxy)-9,10,11-trimethoxytetrahydroprotoberberine (18 and 17). The rank order of beta 2-agonist activity for these compounds was 3 greater than 1 greater than 2 greater than 4. The rank order of activity as beta 1 agonists on the guinea pig atria is 1 greater than 3 greater than 2, and 4 was inactive. The methylated analogues show selectivity for beta 2 receptors in our preliminary pharmacological studies. The threo isomer 3 is the most potent and selective beta 2 stimulant reported to date in the tetrahydroisoquinoline class. |
| Databáze: | OpenAIRE |
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