of biologically active compounds including pyrazol core using aspirin as a novel and green catalyst. The synthesis of bis(pyrazol-5-ol) derivatives was developed via one-pot, pseudo-five-component condensation, and the target dihydropyrano[2,3-c]pyrazoles and spiropyranopyrazoles were prepared by one-pot, four-component reaction. These reactions can be performed in tandem from readily available starting
摘要本文旨在提出两种简便且环境友好的途径,以使用
阿司匹林作为新型绿色催化剂快速组装包括
吡唑核心在内的
生物活性化合物。通过一锅,拟五组分缩合反应和目标二氢
吡喃[2,3- c]进行了双(
吡唑-5-醇)衍
生物的合成。通过一锅四组分反应制备对
吡唑和螺
吡喃并
吡唑。这些反应可以由容易获得的原料串联进行。本方法的主要优点是操作简便,无需柱色谱法,不需要廉价的材料,避免了无害和腐蚀性的酸催化剂,反应时间短,产品收率好以及将
阿司匹林用作无毒,廉价,市售的高效催化剂。 图形概要