volume 33, issue 22, P6408-6412 2014
DOI: 10.1021/om500745y
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Abstract: The synthesis of polyaryl phosphonium salts by cyclotrimerization of aryl alkynes is induced by a stoichiometric amount of the ruthenium η 5 -pentadienyl complex (η 5 -C 5 H 7 )(PPh 3 ) 2 RuCl (1). With only 1 mol % quantity, complex 1 efficiently catalyzed the dimerization of aryl alkynes at room temperature to afford the corresponding (Z)-1,4-diarylbut-1-en-3-yne derivatives as the major products. ■ INTRODUCTIONResearch over several decades on transition-metal pentadienyl compounds has revealed significant …

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