Heterocyclic Analogues of Xanthone and Xanthione. 1H-Pyrano[2,3-c:6,5-c]dipyrazol-4(7H)-ones and Thiones: Synthesis and NMR Data
作者:Barbara Datterl、Nicole Tröstner、Dorota Kucharski、Wolfgang Holzer
DOI:10.3390/molecules15096106
日期:——
The synthesis of the title compounds is described. Reaction of 1-substituted 2-pyrazolin-5-ones with 5-chloro-1-phenyl-1H-pyrazole-4-carbonyl chloride or 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-carbonyl chloride, respectively, using calcium hydroxide in refluxing 1,4-dioxane gave the corresponding 4-heteroaroylpyrazol-5-ols, which were cyclized into 1H-pyrano[2,3-c:6,5-c]dipyrazol-4(7H)-ones by treatment
描述了标题化合物的合成。1-取代的 2-吡唑啉-5-酮与 5-氯-1-苯基-1H-吡唑-4-碳酰氯或 5-氯-3-甲基-1-苯基-1H-吡唑-4-碳酰氯的反应分别使用氢氧化钙回流 1,4-二恶烷得到相应的 4-heteroaroylpyrazol-5-ols,将其环化为 1H-pyrano[2,3-c:6,5-c]dipyrazol-4(7H) - 用 K2CO3/DMF 处理。后者在与劳森试剂反应后转化为相应的硫酮。介绍了环系统及其前体的详细 NMR 光谱研究(1H、13C、15N)。