Abstract
A new class of aryl-heteroarylphosphines, 3-arylbenzofuran-2-ylphosphines, was synthesized by [Cp*Rh(III)]-catalyzed redox-neutral cyclization of N-phenoxyacetamides with 1-alkynylphosphine sulfides and oxides followed by reduction. This step-economic reaction proceeds in excellent regioselectivity with a broad substrate scope. The application of the resulting air-stable trivalent-phosphine containing dicyclohexylphosphino moiety in palladium-catalyzed Suzuki-Miyaura coupling and Buchwald-Hartwig amination of aryl chlorides is also described.
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