Synthesis of 14-Aryl-14H-dibenzo[a,j]xanthene Derivatives Using H-Zeolite A as an Efficient and Reusable Catalyst under Solvent-Free Condition

Sami Ullah Bhat,Manzoor Ahmad Malla,Rawoof Ahmad Naikoo,Muzzaffar Ahmad Mir,Rayees Ahmad Bhat,Radha Tomar

doi:10.1155/2016/7908584

Abstract

H-Zeolite A is an efficient, excellent, and reusable catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives by one-pot synthesis of β-naphthol with various aromatic aldehyde derivatives under solvent-free condition. The synthesized zeolite H-Zeolite A was characterized by XRD, SEM, and FT-IR. The synthesized products were characterized by FT-IR and 1H-NMR spectra. Simple workup procedure, short reaction time, high yield, and reusability of the catalyst are the characteristic features of these reactions.

Highlights

The homogenous acid catalysts such as AlCl3, HCL, and H2SO4 are used for organic reactions carried out in industries and laboratories
In the X-ray diffraction pattern it is shown that degree of crystallinity is very high and all the materials are crystalline in nature without any amorphous
To show the advantages of H-Zeolite A in comparison with some other reported catalysts, we found that some results for the synthesis of 14-(4-chlorophenyl)-14Hdibenzo[a,j]xanthene shown in Table 4 indicate that HZeolite A is an excellent catalyst with respect to reaction time and yield compared to previously reported literature

Summary

Introduction

The homogenous acid catalysts such as AlCl3, HCL, and H2SO4 are used for organic reactions carried out in industries and laboratories. A number of synthetic methods have been reported in the literature for the synthesis of xanthene derivatives in the presence of various catalysts such as AcoH-H2SO4 [24], P-TSA [25], sulfamic acid [26], molecular iodine [27], silica sulfuric acid [28], heteropoly acids [29], Amberlyst-15 [30], cyanuric chloride [31], NaHSO4 [32], nano-TIO2 [33], Al(HSO4)3 [34], InCl3 [35], Yb(OTf)3 [36], and cellulose H2SO4 [37] These above-mentioned methods have some limitations such as long reaction time, expensive reagents, strong acidic condition, and a very low yield. The main purpose of this study is to utilize the H-Zeolite A as an efficient catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives

Objectives

Methods

Results