Diastereoselective Synthesis of Pyrazolines using a Bifunctional Brønsted Acidic Ionic Liquid under Solvent-Free Conditions
作者:Shirin Safaei、Iraj Mohammadpoor-Baltork、Ahmad R. Khosropour、Majid Moghadam、Shahram Tangestaninejad、Valiollah Mirkhani
DOI:10.1002/adsc.201200191
日期:2012.11.12
An efficient protocol for the excellent diastereoselective synthesis of pyrazolines via a three-component reaction of aldehydes, hydrazines and dimethyl acetylenedicarboxylate (DMAD) in the presence of a bifunctional Brønsted acidic ionic liquid as a reusable catalyst under solvent-free conditions is reported. Easy work-up, short reaction times, high yields of the products and an environmentally benign
为吡唑啉的非对映选择性优良的合成高效的协议经由报道醛类,肼类的在双官能性布朗斯台德酸性离子液体的存在,作为无溶剂的条件下,可重复使用的催化剂的三组分反应和乙炔二(DMAD)。该方法的其他显着特点是易于后处理,反应时间短,产物的产率高以及避免有毒有机溶剂的环境友好程序。