期刊
CATALYSIS TODAY
卷 196, 期 1, 页码 148-155出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2012.05.026
关键词
Multi-component synthesis; 2H-Indazolo[2,1-b]phthalazine-1,6,11(13H)-trione; Solvent-free; PEG-OSO3H; Catalyst; E-factor
资金
- Persian Gulf University Research Council
- Payame Noor University (PNU) Research Council
A green practical method for the efficient synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-triones using sulfuric acid-modified polyethylene glycol-6000 (PEG-OSO3H) as an eco-friendly polymeric catalyst from the four-component condensation reaction of phthalic anhydride, hydrazinium hydroxide, 1,3-cyclohexanedione or 5,5-dimethyl 1,3-cyclohexanedione (dimedone) and aromatic aldehydes under solvent-free conditions at 80 degrees C is described. This approach allowed the environmental impact factor (E-factor) to be minimized. (C) 2012 Elsevier B. V. All rights reserved.
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