CeCl3-promoted one-pot synthesis of multisubstituted bispyrano[2,3-c]pyrazole derivatives
作者:Keyume Ablajan、Li-Ju Wang、Zulipiya Maimaiti、Yong-Ting Lu
DOI:10.1007/s00706-013-1104-6
日期:2014.3
AbstractA simple and efficient method was developed for the synthesis of multisubstituted bispyrano[2,3-c]pyrazole derivatives via one-pot reaction of β-keto esters, hydrazine (or phenylhydrazine), terephthalaldehyde, and malononitrile in the presence of CeCl3·7H2O (10 mol%) as a catalyst. This method provides the products in good yields after a simple workup procedure without further purification
摘要开发了一种简单有效的方法,在存在CeCl 3 ·的情况下,通过β-酮酸酯,肼(或苯肼),对苯甲醛和丙二腈的一锅反应,合成多取代的双吡喃并[2,3- c ]吡唑衍生物。 7H 2 O(10 mol%)作为催化剂。通过简单的后处理步骤,该方法无需进一步纯化即可提供高收率的产物。 图形概要