Biagi G, Giorgi I, Livi O, Lucacchini A, Martini C, Scartoni V. Studies on specific inhibition of benzodiazepine receptor binding by some C-benzoyl-1,2,3-triazole derivatives.
J Pharm Sci 1993;
82:893-6. [PMID:
8229686 DOI:
10.1002/jps.2600820906]
[Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Certain new (1-15) or previously described (16-25) 1,2,3-triazole derivatives, characterized by a C-benzoyl substituent, were synthesized and tested for their ability to displace [3H]flunitrazepam from bovine brain membrane. Compounds 11a and 9a, bearing neutral and lipophilic substituents (phenethyl and cyclohexyl, respectively) showed the higher activity. The 5-benzoyl isomer 11b presented a lower activity, equivalent to that of the triazole acetic derivative 23, which is 4-benzyl substituted. Generally, the carboxymethyl radical in the 1-position of the triazole ring decreased the activity, probably because of intramolecular hydrogen bonding with the carbonyl function of the benzoyl substituent. The N-1 unsubstituted triazole derivatives 24 and 25 were ineffective; this result is in disagreement with our previous observations. Probably these molecules interact with the receptor site by a hydrogen bonding acceptor group and by a bulky and lipophilic portion or a hydrogen bonding donor function that is appropriately arranged.
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