Synthesis and analgesic properties of 5-acyl-arylhydrazone 1-H pyrazolo [3,4-b] pyridine derivatives

A series of 5-acyl-arylhydrazone 1-H pyrazolo [3,4-b] pyridine derivatives (1), planned by applying classical ring isosterism, were synthesized in order to evaluate the structure-activity relationship (SAR), especially the participation of the structural acyl-arylhydrazone subunit in the analgesia....

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Veröffentlicht in:Pharmaceutica acta Helvetiae 1994-12, Vol.69 (3), p.163-169
Hauptverfasser: Dias, Luiza Rosaria S., Alvim, Maria JoséF., Freitas, Antonio Carlos C., Barreiro, Eliezer J., Miranda, Ana Luisa P.
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Sprache:eng
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Zusammenfassung:A series of 5-acyl-arylhydrazone 1-H pyrazolo [3,4-b] pyridine derivatives (1), planned by applying classical ring isosterism, were synthesized in order to evaluate the structure-activity relationship (SAR), especially the participation of the structural acyl-arylhydrazone subunit in the analgesia. The synthetic route used produced the derivatives 1 in ∼ 40% overall yield, using 9 as key intermediate. The results obtained from this study showed that in general the compounds of this series present a powerful analgesic activity in the test of abdominal contortions induced by acetic acid i.p. in albino mice, indicating the participation of the acyl-arylhydrazone moiety, as well the relevance of the substituent of the aryl ring, in the activity.
ISSN:0031-6865
DOI:10.1016/0031-6865(94)90019-1