Abstract
Synthesis of a new phosphene-free nano-size formamidine-based palladium complex have been achieved. The molecular structure of novel palladium complex have been confirmed using spectroscopic methods of analysis as well as physical characterizations. The synthesized complex has been used as a catalyst for microwave assisted aqueous Suzuki-Miyaura Cross-coupling (SMC) of aryl bromides with phenylboronic acid. The formamidine-based Pd(II)-complex exhibited excellent catalytic activity to obtain biaryls using mild reaction conditions.
Highlights
Cross-coupling reactions with transition-metal-catalysts are considerably useful synthetic process for C-C bonds formation [1, 2, 3]
The Suzuki-Miyaura cross-coupling (SMC) [4], has become charming standard procedure for the synthesis of biaryls, which have an assorted spectrum of implementations, extending from pharmaceuticals to materials science [5]
Numerous homogenous or heterogeneous palladium catalyst have been designed for microwave assisted Suzuki reactions [26, 27, 28, 29, 30, 31, 32, 33, 34], while, the formamidine palladium(II)complexes utilized in catalysis of SMC are much little
Summary
Cross-coupling reactions with transition-metal-catalysts are considerably useful synthetic process for C-C bonds formation [1, 2, 3]. Numerous homogenous or heterogeneous palladium catalyst have been designed for microwave assisted Suzuki reactions [26, 27, 28, 29, 30, 31, 32, 33, 34], while, the formamidine palladium(II)complexes utilized in catalysis of SMC are much little. Derived from the excellent results obtained in our previous works on the use transition metal complexes in various applications especially palladium(II)-complexes [35, 36, 37, 38, 39], we report here our study on the synthesis of new pyrimidyl formamidine-based palladium(II)-complex 4 (Fig. 2) and study its catalytic activity in the microwave assisted SMC of aryl bromides with phenylboronic acid under aerobic conditions in water
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