246047-72-3, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. (1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium, cas is 246047-72-3,the ruthenium-catalysts compound, it is a common compound, a new synthetic route is introduced below.
Synthesis and characterization of [(IMesH2)(PCy3)(Cl)2Ru?CF2]: A solution of 0.32 g (0.37 mmol) [(IMesH2)(PCy3)(Cl)2Ru?CHPh] (5) in dry, degassed benzene (15 mL) in a thick-walled glass ampule was put under 1.5 atm of 1,1-difluoroethylene. The reaction was heated at 60 C. for 12 hrs, during which time it changed from reddish to brown in color. The solution was then concentrated to 5 mL and purified by column chromatography in air (silica gel, 5:1 pentane/THF). The orange fraction was stripped of solvent and dried under vacuum: yield 0.26 g (86%). 1H NMR (499.852 MHz, 25 C., CD2Cl2): delta 1.118 [br, 15H, PCy3], 1.626 [br, 15H, PCy3], 2.248 [s, 3H, p-CH3 of Mes], 2.285 [s, 3H, p-CH3 of Mes], 2.385 [m, 3H, PCy3], 2.480 [s, 6H, o-CH3 of Mes], 2.551 [s, 6H, o-CH3 of Mes], 4.003 [s, 4H, NCH2CH2N], 6.921 [s, 4H, m-H of Mes]. 13C {1H} NMR (125.705 MHz, 30 C., C6D6): delta 19.44 [s, CH3 of Mes], 20.65 [s, CH3 of Mes], 21.49 [s, CH3 of Mes], 21.50 [s, CH3 of Mes], 26.92 [d, J=1.3 Hz, PCy3], 28.50 [d, J=10 Hz, PCy3], 30.14 [s, PCy3], 33.34 [d, J=18 Hz, PCy3], 51.86 [d, 4 JPC=2.6 Hz, NCH2CH2N], 52.61 [d, 4JPC=3.5 Hz, NCH2CH2N], 127.30 [s, Mes], 128.17 [s, Mes], 129.26 [s, Mes], 129.51 [s, Mes], 130.11 [s, Mes], 130.52 [s, Mes], 134.68 [d, 4 JPC=0.7 Hz, ipso-C of Mes], 136.85 [s, ipso-C of Mes], 138.91 [s, Mes], 138.93 [s, Mes], 139.03 [s, Mes], 139.67 [s, Mes], 217.23 [d, 2JCP=87 Hz, NCN], 218.09 [td, 2JCP=12 Hz, 1 JCF=430 Hz, Ru?CF2]. 19F NMR (282.192 MHz, 25 C., CD2Cl2): delta 133.74 [d, 3JFP=4.5 Hz]. 31P {1H} NMR (121.392 MHz, 25 C., CD2Cl2): delta 32.15 (t, 3 JPF=4.4 Hz]. IR (KBr pellet): 1167 and 1172 (nuC-F).
The chemical industry reduces the impact on the environment during synthesis,246047-72-3,(1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium,I believe this compound will play a more active role in future production and life.
Reference£º
Patent; CALIFORNIA INSTITUTE OF TECHNOLOGY; Grubbs, Robert H.; Chatterjee, Arnab K.; Choi, Tae-Lim; Goldberg, Steven D.; Love, Jennifer A.; Morgan, John P.; Sanders, Daniel P.; Scholl, Matthias; Toste, F. Dean; Trnka, Tina M.; (27 pag.)US9403854; (2016); B2;,
Highly efficient and robust molecular ruthenium catalysts for water oxidation
Catalysts | Special Issue : Ruthenium Catalysts – MDPI