Preparation, Characterizations of TS-1 Zeolite: An Effective Solid Acid Catalyst for the Synthesis of 1, 3, 5-Triaryl-2-Pyrazolins

ABSTRACT

A clean and efficient method has been developed for the synthesis 1, 3, 5-triaryl-2-pyrazoline derivatives via cyclocondensation of chalcone and phenyl hydrazine using TS-1 as solid heterogeneous reusable catalyst. The catalyst was synthesized by the hydrothermal method under autogenous pressure. The prepared catalyst was characterized by Powder-X-ray diffraction (XRD), Fourier-transform infrared spectroscopy spectroscopy, scanning electron microscope-Energy dispersive spectroscopy (EDAX) and Brunauer–Emmett–Teller surface area analysis. The present method offers significant advantages over the reported methods like easy separation of catalyst, simple work-up procedure, and excellent yield of desired products. Furthermore, catalyst could be reused without significant loss in activity.

KEYWORDS:

• Chalcone
• phenyl hydrazine
• TS-1
• 1, 3, 5-triaryl-2-pyrazoline

Acknowledgment

We are grateful to the Head, Department of Chemistry, Dr. B.A.M. University, Aurangabad–431004 (MS), India for providing the laboratory facility, and to the STIC Cochin and SAIF Chandigarh characterization facilities.

Funding

The corresponding author MKL is thankful to UGC for providing grant under major research project F. No. 43-184/2014 (SR).