Abstract:
:A four-step synthesis of 2-chlorodopamine (2b) is presented as well as methods for the syntheses of the N-methyl, ethyl, and n-propyl analogues (2c-e). Compounds 2b and 2c were essentially equipotent to dopamine for increasing renal blood flow in anesthetized dogs that had been treated with the alpha-adrenergic antagonist phenoxybenzamine. The increases in renal blood flow were blocked by the DA1 antagonist (R)-(+)-8-chloro-2,3,4,5-tetrahydro-3-methyl-5-phenyl-1H-3-benzazepine. Compounds 2d and 2e were significantly less potent than dopamine in the same model; the increases in renal blood flow were attenuated by propranolol and blocked by a combination of propranolol and (R)-(+)-8-chloro-2,3,4,5-tetrahydro-3-methyl-5-phenyl-1H-3-benzazepine. The significance of an o-chloro substituent on dopamine analogues for the activation of the DA1 receptor is briefly discussed.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
McCarthy JR,McCowan J,Zimmerman MB,Wenger MA,Emmert LWdoi
10.1021/jm00159a005subject
Has Abstractpub_date
1986-09-01 00:00:00pages
1586-90issue
9eissn
0022-2623issn
1520-4804journal_volume
29pub_type
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journal_title:Journal of medicinal chemistry
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