Pyridine ionic liquid coordinated Pd complex immobilized on SBA-15:A recoverable and efficient catalyst for the Mizoroki-Heck coupling reaction

In recent years, intensive studies have focused on the preparation and supporting of palladium complexes with various types of ligands for coupling reactions. Such efforts have resulted in improving the efficiency of organic syntheses and decreasing processes time, reactions costs and generation of byproducts 1. Heck reaction has a great potential for industrial applications, however, due to the properties and activities of the existing catalysts, limited industrial applications have been observed 2. In this work a SBS-15 supported ionic liquid based on pyridine eas prepared and complexed with Pd(II), Scheme 1 3.The reaction mixture cooled to room temperature and the gray solid catalyst was filtered in vacuum, washed with dicholorometan and dried. The Pd content of the catalyst was 7.9 wt.% as obtained by ICP-AES. The nanocatalyst was tested in Heck coupling reaction of iodobenzen and methylacrylate. The reaction conversion was increased up to 100%, as measured by GC analysis, by optimizing of the model reaction conditions.

Keywords:

Heck coupling , SBA-15 , Palladium(II) , Nanocatalyst , Ionid liquid