Synthesis of Pyrano[2,3- c]pyrazoles Catalyzed by Poly(ethylene glycol) Bridged Triethylamine Functionalized Dication Ionic Liquid
Wang Yinglei, Luo Jun, Xing Tantan, Liu Zuliang
Chin. J. Org. Chem. . 2013, (9): 2016 -2021 .  DOI: 10.6023/cjoc201301034