Catalytic applications of {[HMIM]C(NO<sub>2</sub>)<sub>3</sub>}: as a nano ionic liquid for the synthesis of pyrazole derivatives under green conditions and a mechanistic investigation with a new approach
作者:Mohammad Ali Zolfigol、Fatemeh Afsharnadery、Saeed Baghery、Sadegh Salehzadeh、Farahnaz Maleki
DOI:10.1039/c5ra16289k
日期:——
the same reaction conditions. The described reactions were in good agreement with the green chemistry disciplines and their major advantages are short reaction times, good yields, ease of separation, recycling and reusability of NIL. A new mechanistic approach was proposed for the final step of the pyrazolessynthesis which was supported by theoretical studies.
研究了1-甲基咪唑三硝基甲烷[HMIM] C(NO 2)3 }作为第一类纳米离子液体(NIL)的催化应用。所描述的NIL在无溶剂和环境条件下于室温下以各种芳香醛,丙二腈和苯肼的三组分缩合反应,以良好至优异的收率有效地测试了5-氨基-吡唑-4-腈衍生物的合成。在下一个研究中,还通过以下方法合成了1,4-二氢吡喃基-[2,3- c ]-吡唑衍生物在相同反应条件下,在NIL的存在下,将多种芳族醛,丙二腈,苯肼和乙酰乙酸乙酯进行四组分缩合。所描述的反应与绿色化学学科非常吻合,它们的主要优点是反应时间短,收率高,NIL易于分离,回收和可重复使用。吡唑合成的最后一步提出了一种新的机制方法,该方法得到了理论研究的支持。