Protonated Aminocyclopentadienyl Ruthenium Hydride Reduction of Benzaldehyde and the Conversion of the Resulting Ruthenium Triflate to a Ruthenium Hydride with H2 and Base
摘要:
Reaction of N-phenyl-2,5-dimethyl-3,4-diphenylcyclopenta-2,4-dienimine (6) with Ru3CO12 formed two isomers of {[2,5-Me-2-3,4-Ph-2(eta(5) -C4CNHPh)]Ru(CO)(mu-CO)}(2) (8-trans and 8-cis). Photolysis of 8 under a H-2 atmosphere led to the formation of the aminocyclopentadienyl ruthenium hydride [2,5-Me-2-3,4-Ph-2(eta(5)-C4CNHPh)]Ru(CO)(2)H (9-H). 9-H reduced benzaldehyde slowly at 75 degreesC to give benzyl alcohol and 8. Protonation of 9-H with triflic acid produced {[2,5-Me-2-3,4-Ph-2(eta(5)-C4CNH2Ph)]Ru(CO)(2)H}OTf (11-H), which reacted rapidly with benzaldehyde at -80 degreesC to give benzyl alcohol and [2,5-Me-2-3,4-Ph-2(eta5-C4CNHPh)]Ru(CO)(2)OTf(9-OTf). Reaction of 9-OTf with H2 and base led to the re-formation of 9-H. These reactions provide the transformations required for a catalytic cycle for hydrogenation of aldehydes.
Protonated Aminocyclopentadienyl Ruthenium Hydride Reduction of Benzaldehyde and the Conversion of the Resulting Ruthenium Triflate to a Ruthenium Hydride with H2 and Base
摘要:
Reaction of N-phenyl-2,5-dimethyl-3,4-diphenylcyclopenta-2,4-dienimine (6) with Ru3CO12 formed two isomers of {[2,5-Me-2-3,4-Ph-2(eta(5) -C4CNHPh)]Ru(CO)(mu-CO)}(2) (8-trans and 8-cis). Photolysis of 8 under a H-2 atmosphere led to the formation of the aminocyclopentadienyl ruthenium hydride [2,5-Me-2-3,4-Ph-2(eta(5)-C4CNHPh)]Ru(CO)(2)H (9-H). 9-H reduced benzaldehyde slowly at 75 degreesC to give benzyl alcohol and 8. Protonation of 9-H with triflic acid produced {[2,5-Me-2-3,4-Ph-2(eta(5)-C4CNH2Ph)]Ru(CO)(2)H}OTf (11-H), which reacted rapidly with benzaldehyde at -80 degreesC to give benzyl alcohol and [2,5-Me-2-3,4-Ph-2(eta5-C4CNHPh)]Ru(CO)(2)OTf(9-OTf). Reaction of 9-OTf with H2 and base led to the re-formation of 9-H. These reactions provide the transformations required for a catalytic cycle for hydrogenation of aldehydes.
Redox reaction between benzyl azides and aryl azides: concerted synthesis of aryl nitriles and anilines
作者:Yongjin Kim、Young Ho Rhee、Jaiwook Park
DOI:10.1039/c6ob02615j
日期:——
unique and novel reaction between benzyl azides and aryl azides is described to synthesize aryl nitriles and anilines concurrently, which is catalyzed with a photoactivated diruthenium complex. N-Unsubstituted imines (N–H imines) are generated first from benzyl azides, followed by the hydrogen transfer reaction between N–H imines and aryl azides. A wide range of aryl nitriles and anilines were synthesized
Synthesis and Reactivity of Hydroxycyclopentadienyl and Aminocyclopentadienyl Ruthenium Alcohol Complexes
作者:Charles P. Casey、Thomas E. Vos、Galina A. Bikzhanova
DOI:10.1021/om020891e
日期:2003.3.1
Cationic aminocyclopentadienyl and hydroxycyclopentadienyl ruthenium alcohol complexes were synthesized from reaction of the corresponding ruthenium chloride with AgBF4 in the presence of an alcohol. Exchange rates of free alcohol with hydroxycyclopentadienyl and aminocyclopentadienyl ruthenium benzyl alcohol complexes were rapid (t(1/2) = 5-10 min) at -47 degreesC.