Coupling Reactions of Terminal Acetylenes with Ruthenium Complexes Containing the Ortho-Metalated Ligand 2,6-(PPh2CH2)2C6H3
摘要:
Reactions of RuCl(PPh3)(PCP) (PCP = 2,6-(PPh2CH2)(2)C6H3) with PhC equivalent to CH and HC equivalent to CC-(OH)Ph-2 gave the unusual coupling products RuCl(PPh3)(eta(4)-PhCH=C-2, 6-(PPh2CH2)(2)C6H3) and RuCl(PPh3)(eta(4)-Ph2C(OH)CH=C-2,6-(PPh2CH2)(2)C6H3), respectively. Dehydration was observed in the coupling reactions of RuCl(PPh3)(PCP) with HC equivalent to CC(OH)PhMe and HC equivalent to C-cyclo-C6H10(OH). Thus, the coupling products RuCl(PPh3)(eta(4)-CH2=CPhCH=C-2,6-(PPh2-CH2)(2)C6H3) and RuCl(PPh3)(eta(4)-cyclo-C6H9-CH=C-2,6-(PPh2CH2)(2)C6H3) were obtained from the reactions of RuCl(PPh3)(PCP) with HC equivalent to CC(OH)PhMe and HC equivalent to C-cycle-C6H10(OH), respectively. Treatment of [Ru(PMe3)(2)(PCP)]BF4 with PhC equivalent to CH produced [Ru(PMe3)(2)(eta(4)-PhCH=C-2,6-(PPh2CH2)(2)C6H3)]BF4.