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43.6.1.3.2 Method 2: Indium/Palladium-Catalyzed Cross Coupling of Haloarenes and Terminal Alkynes

DOI: 10.1055/sos-SD-043-00304

Griesbeck, A. G.; Soldevilla, A.Science of Synthesis, (200843358.

A cross-coupling methodology using dichlorobis(triphenylphosphine)palladiumindium(III) bromide [PdCl2(PPh3)2InBr3] as catalyst has been described.[‌58‌] The reaction proceeds under analogous conditions to the classical Sonogashira reaction, but the copper(I) cocatalyst is replaced by indium(III) bromide. The cross coupling works for iodoarenes at room temperature, yielding arylalkynes 27 in 7499% (Scheme 16).

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