Article (Scientific journals)
Electrooxidation Potential as a Tool in the Early Screening for New Safer Clozapine-Like Analogues
Mouithys-Mickalad, Ange; Kauffmann, J. M.; Petit, C. et al.
2001In Journal of Medicinal Chemistry, 44 (5), p. 769-76
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Abstract :
[en] The chemical modification of clozapine (1) has permitted the finding of new analogues, e.g., olanzapine (2), quetiapine (3), 5-(4-methylpiperazin-1-yl)-8-chloropyrido[2,3-b][1,5]benzoxazepine fumarate (9), with a clinical or psychopharmacological profile similar to that of clozapine. However, when developing new derivatives, the designers are discouraged by the development of clozapine-induced agranulocytosis. Different researchers have raised the role played by the oxidizability of the molecule in such a deleterious effect. In the present paper, we examined the oxidation profile (direct scavenging abilities, efficacy in inhibiting lipid peroxidation, and electrooxidation potential) of newly developed methoxy and trifluoromethylsulfonyloxy analogues related to clozapine, some of them being described as putative antipsychotic. The oxazepine derivative 7, unlike the other diazepine derivatives (6, 10--12), was not readily oxidized. Using a statistical predictive model for hematotoxicity previously described, 7 was found in the cluster of potentially nontoxic compounds while diazepine derivatives 6 and 10-12 were classified as potentially toxic compounds. Among these original compounds, 7, which presents a preclinical clozapine-like profile and a low sensitivity to oxidation, could be a promising antipsychotic candidate with low side effects. Considering the tricyclic derivatives examined so far, some elements of structure-oxidation relationship (SOR) might be pointed out. Regarding the nature of the tricyclic ring substituent, from the most to the least sensitive to oxidation, the sequence was as follows: HO > Cl > CH(3)O > CF(3)SO(2)O. The nature of the tricyclic ring influenced also the sensitivity to oxidation; the diazepine moiety appeared to be the most reactive ring compared to oxa- and thiazepine congeners. These parameters could be advantageously integrated in the early design of new safer clozapine-like analogues.
Research center :
C.I.R.M.
Disciplines :
Pharmacy, pharmacology & toxicology
Author, co-author :
Mouithys-Mickalad, Ange ;  Université de Liège - ULiège > Centre de l'oxygène : Recherche et développement (C.O.R.D.)
Kauffmann, J. M.
Petit, C.
Bruhwyler, J.
Liao, Y.
Wikstrom, H.
Damas, Jacques ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Département des sciences biomédicales et précliniques
Delarge, J.
Deby-Dupont, G.
Geczy, J.
Liégeois, Jean-François ;  Université de Liège - ULiège > Département de pharmacie > Chimie pharmaceutique
Language :
English
Title :
Electrooxidation Potential as a Tool in the Early Screening for New Safer Clozapine-Like Analogues
Publication date :
01 March 2001
Journal title :
Journal of Medicinal Chemistry
ISSN :
0022-2623
eISSN :
1520-4804
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
44
Issue :
5
Pages :
769-76
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
ULg FSR - Université de Liège. Fonds spéciaux pour la recherche [BE]
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