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A facile and less expensive monophosphinite ligand 2-(diphenylphosphinoxy)-naphthyl, C 10 H 7 OPPh 2 (1) has been synthesized from the reaction of β-naphthol with chlorodiphenylphosphine. The mixture of Pd(OAc) 2 and 1 catalyzes the Suzuki cross-coupling of a variety of aryl halides with aryl boronic acids at room temperature or at 60°C, giving generally high yields...