Suzuki–Miyaura coupling catalyzed by palladium nanoparticles biosynthesized using Glycyrrhiza glabra as reducing and stabilyzing agent

Abstract

An unprecedented environmentally friendly method has been developed for the synthesis of palladium nanoparticles supported on Glycyrrhiza glabra. The synthesized nanoparticles were utilized in Suzuki–Miyaura reaction between different aryl halides and aryl bronic acid in aqueous media. This heterogeneous catalyst can be reused and recycled repeatedly more than five times with only slight loss of its initial catalytic efficiency. This reaction carrid out under atmospheric pressure with high efficiency, unique and simple work‐up procedure and excellent yields.

Green chemical synthesis of Pd nanoparticles for use as efficient catalyst in Suzuki‐Miyaura cross‐coupling reaction

“…Additionally, the phytochemicals are also useful in controlling the size and shape of Pd NPs . The most prominent examples of plant used so far include Pulicaria glutinosa , Delonix regia , Euphorbia thymifolia , Stachys lavandulifolia , Sapindus mukorossi , Glycyrrhiza glabra , Pistacia atlantica kurdica , Origanum vulgare , watermelon rind and so on. However most of the above‐mentioned plants are either economically important or edible or have medicinal values.…”

“…The high surface‐to‐volume ratio in the nanometer dimension even makes Pd NPs more effective catalyst . Subsequently Pd NPs are widely used as catalyst in low‐temperature oxidation/reduction of automobile pollutants, coupling reactions, hydrogenation reaction as well as other organic reactions. However, Pd earned a reputation as a catalyst for their remarkable success in C‐C coupling reactions which is considered to be one of the most powerful and a versatile method for the synthesis of asymmetric biaryl compounds from aryl boronic acids and aryl halides.…”