Phosphine-Free Suzuki Cross-Coupling Reaction Using an Efficient and Reusable Pd Catalyst in an Aqueous Medium Under Microwave Irradiation |
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| Authors: | Joaquim F M da Silva Andres F Yepes Perez Natália P de Almeida |
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| Institution: | 1. Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Braziljoaquim@iq.ufrj.br;3. Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil;4. Facultad de Ciencias Físicas Exactas y Naturales, Universidad de Santander (UDES), Bucaramanga, Colombia |
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| Abstract: | AbstractWe report here an improved, highly efficient, and general method for the ligand-free Suzuki cross-coupling reaction to the synthesis of biaryls, bipyridyls, thienylpyridine, and allylphenols. Microwave irradiation of (het)aryl halides and (hetaryl, allyl)arylboronic acid N-methyl-iminodiacetic acid (MIDA) ester, using polyurea microencapsulated palladium catalyst (Pd EnCat 30), gave the coupling adducts 1a–x in excellent yields in just 10–18 min. |
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| Keywords: | Microwave irradiation Pd EnCat30 phosphine-free reactions organoboronic acid MIDA ester Suzuki coupling |
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