Aspirin: an efficient catalyst for synthesis of bis (pyrazol-5-ols), dihydropyrano[2,3-c]pyrazoles and spiropyranopyrazoles in an environmentally benign manner
作者:Maryam Fatahpour、Fatemeh Noori Sadeh、Nourallah Hazeri、Malek Taher Maghsoodlou、Mojtaba Lashkari
DOI:10.1007/s13738-017-1133-x
日期:2017.9
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