A Pd/C catalysed facile and practical preparation of diaryl‐substituted norbornenes has been developed. Under mild conditions, a range of disubstituted norbornenes and norbornanes have been prepared in good to useful yields. These norbornene analogues have shown to be good additives for speeding up the reaction as well as for the efficient preparation of bis‐alkylated benzamides.
An efficient protocol for the Suzuki and Heck reactions of arenediazonium tetrafluoroborate salts catalyzed by Pd(PPh 3) 4-derived nanoparticles palladium catalyst has been developed. This method is able to prepare a variety of biaryls and aryl olefin under air atmosphere at 25 ℃ in ethanol. In the presence of this catalyst, the cross-coupling reactions of arenediazonium tetrafluoroborate salts with arylboronic acids and olefin proceed smoothly and afford the desired coupling products with good yields, respectively. The catalyst could be recycled 4 times without loss of activity and decrease of yield.
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