| Title | A new class of anticonvulsants possessing 6Hz activity: 3,4-Dialkyloxy thiophene bishydrazones. | | Author(s) | Kulandasamy R, Adhikari AV, Stables JP | | Institution | Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Srinivasnagar, Mangalore 575025. Karnataka, India. | | Source | Eur J Med Chem 2009 May 28. | | Abstract | Thirty nine new 3,4-di(substituted)oxy-N(2),N(5)-bis(substituted)thiophene-2,5-dicarbohydrazides were synthesized starting from ethyl thiodiglycolate through multi-step reactions. In the synthetic sequence, 3,4-dihydroxythiophene-2,5-diester (1) was obtained by condensing the ethyl thiodiglycolate with diethyl oxalate. It was derivatized using different alkyl halides to give disubstituted thiophene esters (2-5), which were then converted to corresponding hydrazides (6-9) following usual methods. Finally, these hydrazides, on treatment with various substituted carbonyl compounds underwent smooth condensation to yield target hydrazones (10-13). The new compounds were characterized using FT-IR, (1)H NMR and (13)C NMR, mass spectral and elemental analyses. The anticonvulsant activity of the title compounds was established after intraperitoneal (ip) administration in three seizure models, which include maximal electroshock (MES), subcutaneous pentylenetetrazole (scPTZ) and 6Hz screens and their neurotoxicity was also evaluated. Compound 11f has emerged as an active compound with no neurotoxicity in this series. Also, the structure-activity relationship of the tested compounds was discussed. | | Language | ENG | | Pub Type(s) | JOURNAL ARTICLE
| | PubMed ID | 19556038 |
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