Synthesis of some new bipyridines, thieno[2,3-b]pyridines, and pyrazolo[3,4-b]pyridines
作者:Mahmoud A. Mohamed
DOI:10.1002/jhet.802
日期:2012.1
3‐hydroxy‐1‐(pyridin‐3‐yl)prop‐2‐en‐1‐one gave 6‐oxo‐[2,3′]bipyridine 5a and 6‐thioxo‐[2,3′]bipyridine 5b derivatives, respectively. Compound 5b upon treatment with different methylenes 8 gave thieno[2,3‐b]pyridines 10. Treatment of 5b with iodomethane gave bipyridine derivative 7, which cyclocondensed with hydrazines 11 to give pyrazolo[3,4‐b]pyridines 13. J. Heterocyclic Chem., (2012).
氰基乙酰胺和氰基硫代乙酰胺与3-羟基-1-(吡啶-3-基)丙-2-烯-1-酮的钠盐进行环缩合得到6-氧代[2,3']联吡啶5a和6-硫代[[ 2,3']联吡啶5b衍生物。用不同的亚甲基8处理后的化合物5b得到噻吩并[2,3- b ]吡啶10。用碘甲烷处理5b得到联吡啶衍生物7,联吡啶衍生物7与肼11环缩合,得到吡唑并[3,4- b ]吡啶13。J.杂环化学。(2012)。