Synthesis of 5-alkoxythieno[2,3-e][1,2,4]triazolo[4,3-c]pyrimidine derivatives and evaluation of their anticonvulsant activities.

Synthesis of 5-alkoxythieno[2,3-e][1,2,4]triazolo[4,3-c]pyrimidine derivatives and evaluation of their anticonvulsant activities.
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5-烷氧基噻吩并[2,3-e][1,2,4]三唑并[4,3-c]嘧啶衍生物的合成及其抗惊厥活性评价

DOI:
10.3390/molecules20046827
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发表时间:
2015-04-15
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Quan ZS
Quan ZS
中科院分区:
其他
文献类型:
--
作者:
Wang SB;Piao GC;Zhang HJ;Quan ZS

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本工作涉及由3-氨基-2-噻吩甲酸甲酯制备的新型取代的5-烷氧基噻吩并[2,3-e][1,2,4]三唑并[4,3-c]嘧啶衍生物5a-p的设计和合成。使用最大电休克(MES)和皮下戊四唑(scPTZ)测试筛选最终化合物的体内抗惊厥活性。使用旋转棒试验测试神经毒性(NT)。结构-抗惊厥活性关系分析表明,最有效的结构基序涉及取代的苯酚,特别是当被一个氯、氟或三氟甲基(在间位)或两个氯原子取代时。根据MES和scPTZ模型,这些分子具有高活性。在小鼠腹膜内施用后对化合物的定量评估显示,最具活性的化合物是5-[3-(三氟甲基)苯氧基]噻吩并[2,3-e] [1,2,4]三唑并[4,3-c]嘧啶(5 o),其ED 50值为11.5 mg/kg(MES)和58.9 mg/kg(scPTZ)。此外,化合物50在MES和scPTZ测试中比公知的抗惊厥药物卡马西平和乙琥胺更有效。
This work concerns the design and synthesis of novel, substituted 5-alkoxythieno[2,3-e][1,2,4]triazolo[4,3-c]pyrimidine derivatives 5a–p prepared from 3-amino-2-thiophenecarboxylic acid methyl ester. The final compounds were screened for their in vivo anticonvulsant activity using maximal electroshock (MES) and subcutaneous pentylenetetrazole (scPTZ) tests. Neurotoxicity (NT) was tested using a rotarod test. The structure-anticonvulsant activity relationship analysis revealed that the most effective structural motif involves a substituted phenol, especially when substituted with a single chlorine, fluorine or trifluoromethyl group (at the meta-position), or two chlorine atoms. These molecules possessed high activity according to the MES and scPTZ models. Quantitative assessment of the compounds after intraperitoneal administration in mice showed that the most active compound was 5-[3-(trifluoromethyl)phenoxy]thieno[2,3-e] [1,2,4]triazolo[4,3-c]pyrimidine (5o) with ED50 values of 11.5 mg/kg (MES) and 58.9 mg/kg (scPTZ). Furthermore, compound 5o was more effective in the MES and scPTZ tests than the well-known anticonvulsant drugs carbamazepine and ethosuximide.
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