Synthesis of 2-(1-aryl-1H-tetrazol-5-yl)-thieno[2,3-b]pyridine derivatives
作者:Nikolai Yu. Koltsov
DOI:10.1007/s10593-019-02533-2
日期:2019.8
Alkylation of 4,6-dimethyl-2-sulfanylpyridine-3-carbonitrile with 1-aryl-5-(chloromethyl)-1H-tetrazoles yielded 2-[(1-aryl-1H-tetrazol-5-yl)methyl]sulfanyl}-4,6-dimethylpyridine-3-carbonitriles, which easily cyclize by the action of bases to form 2-(1H-tetrazol-5-yl)-thieno[2,3-b]pyridinederivatives. The use of excess base in the alkylation step leads to direct formation of cyclized products in high yields
用1-芳基-5-(氯甲基)-1 H-四唑烷基化4,6-二甲基-2-磺酰基吡啶-3-甲腈,得到2-[((1-芳基-1 H-四唑-5-基)甲基] ]硫烷基} -4,6-二甲基吡啶-3-腈,其在碱的作用下容易环化形成2-(1 H-四唑-5-基)-噻吩并[2,3- b ]吡啶衍生物。在烷基化步骤中使用过量的碱导致以高收率直接形成环化产物。