The synthesis of dipyrazolo[1,5-a:4',3'-c]pyridines is described. Easily obtainable 5-alkynylpyrazole-4-carbaldehydes, p-toluenesulfonyl hydrazide, and an aldehyde or ketone containing an α-hydrogen atom were reacted in a silver triflate catalyzed multicomponent reaction affording new tricyclic compounds with a dipyrazolo[1,5-a:4',3'-c]pyridine core. Detailed NMR spectroscopic investigations (1H, 13C and 15N) were undertaken with all obtained compounds.
描述了二
吡唑并[1,5-a:4',3'-c]
吡啶的合成。易得的5-炔基
吡唑-4-
甲醛,对
甲苯磺酰
肼和含有α-氢原子的醛或酮在
银三氟甲磺酸盐催化的多组分反应中反应,形成具有二
吡唑并[1,5-a:4',3'-c]
吡啶核心的新
三环化合物。对所有获得的化合物进行了详细的核磁共振光谱研究(1H、13C和15N)。