The Copper-Free Catalytic Synthesis of Diphenylethyne

2 Sonogashira-Hagihara Cross-Coupling with Arenediazonium Salts - Synthesis of 1-(4-Methoxyphenyl)-2-phenylacetylene 

An oven-dried Schlenk tube is charged under argon with 4-methoxybenzenediazonium tetrafluoroborate (0.111 g, 0.5 mmol), -Bu, NI (0.369, 1,0 mmol), PdQ2(PPhj)2 (7 mg, 0.01 mmol), Cul (3.8 mg, 0.02 mmol), diethylamine 

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