Benzodiazepine receptor ligands. Synthesis and pharmacological evaluation of 3-, 7- and 8-substituted [5,1-c][1,2,4]benzotriazines and 5-oxide derivatives. Part I
摘要:
A new series of 3-, 7- and 8-substituted pyrazolo[5,1-c][1,2,4]benzotriazine 5-oxides and a series of pyrazolo[5,1-c][1,2,4]benzotriazines were synthesized and their benzodiazepine receptor affinities were evaluated in vitro. A study of structure-affinity relationships within the series is briefly discussed, considering the role of various substituents at the 3-, 7- and 8-positions and the role of N-5-oxide. Compounds 1b, 1c, 1cR, 4c, 4cR, 9d, 12d and 12dR were evaluated in vivo for their anticonvulsant effects.
A new series of 3-, 8-substituted pyrazolo[5,1-c][1,2,4]benzotriazine 4-oxides 3 were synthesized and their benzodiazepine receptor (BZR) affinities were evaluated in vitro in comparison with their 5-oxide isomers 2. The 4-oxide compounds 3c,m,n,o showed a better receptor affinity than their corresponding 5-oxide isomers, with an efficacy trend of antagonist/partial inverse agonist. From a structure-affinity relationship point of view some insight in the role played by N-4 and Id-oxide is gained. (C) Elsevier, Paris.
Benzodiazepine receptor ligands. Synthesis and pharmacological evaluation of 3-, 7- and 8-substituted [5,1-c][1,2,4]benzotriazines and 5-oxide derivatives. Part I
A new series of 3-, 7- and 8-substituted pyrazolo[5,1-c][1,2,4]benzotriazine 5-oxides and a series of pyrazolo[5,1-c][1,2,4]benzotriazines were synthesized and their benzodiazepine receptor affinities were evaluated in vitro. A study of structure-affinity relationships within the series is briefly discussed, considering the role of various substituents at the 3-, 7- and 8-positions and the role of N-5-oxide. Compounds 1b, 1c, 1cR, 4c, 4cR, 9d, 12d and 12dR were evaluated in vivo for their anticonvulsant effects.
Castillon, Sergio; Melendez, Enrique; Vilarrasa, Jaume, Journal of Heterocyclic Chemistry, 1982, vol. 19, p. 61 - 64