Green and efficient synthesis of novel bispyrazoles through a tandem Knoevenagel and Michael type reaction using nanowire zinc oxide as a powerful and recyclable catalyst

Authors

KHALIL ESKANDARI
BAHADOR KARAMI
SAEED KHODABAKHSHI
SEYYED JAFAR HOSEINI

Abstract

Zinc oxide nanowires (ZnO NWs) were prepared and characterized by scanning electron microscopy, powder X-ray diffraction, and transmission electron microscopy analyses. ZnO NWs were then employed as heterogeneous and recyclable catalyst for green synthesis of some new and known bispyrazole derivatives through a tandem Knoevenagel and Michael type addition reaction of aromatic aldehyde and pyrazolone. The synthetic method is operationally simple and affords product with high yields in short reaction times.

DOI

10.3906/kim-1404-54

Keywords

Zinc oxide nanowire, bispyrazole, aldehyde, green synthesis, nanocatalyst

First Page

1069

Last Page

1077

Recommended Citation

ESKANDARI, K, KARAMI, B, KHODABAKHSHI, S, & HOSEINI, S. J (2015). Green and efficient synthesis of novel bispyrazoles through a tandem Knoevenagel and Michael type reaction using nanowire zinc oxide as a powerful and recyclable catalyst. Turkish Journal of Chemistry 39 (5): 1069-1077. https://doi.org/10.3906/kim-1404-54