Methylene-Linked Bis-NHC Half-Sandwich Ruthenium Complexes: Binding of Small Molecules and Catalysis toward Ketone Transfer Hydrogenation
作者:José Manuel Botubol-Ares、Safa Cordón-Ouahhabi、Zakaria Moutaoukil、Isidro G. Collado、Manuel Jiménez-Tenorio、M. Carmen Puerta、Pedro Valerga
DOI:10.1021/acs.organomet.1c00045
日期:2021.3.22
isolation of the nitrosyl derivative [Cp*Ru(NO)(L)][BPh4]2 (5), which was structurally characterized. The allenylidene complex [Cp*Ru═C═C═CPh2(L)][BPh4] (10) was also obtained, and it was prepared by reaction of 2 with HC≡CC(OH)Ph2 and NaBPh4 in MeOH at 60 °C. Complexes 3, 4, and 6 are efficient catalyst precursors for the transfer hydrogenation of a broad range of ketones. The dihydrogen complex 6 has
络合物[Cp * RuCl(COD)]与L H 2 Cl 2(L =双(3-甲基咪唑-2-亚基))和LiBu n在四氢呋喃中于65°C反应,制得双卡宾衍生物[Cp * RuCl (L)](2)。与此NaBPh化合物反应4下二氮在MeOH,得到不稳定的一氧化二桥连络合物[的Cp *茹(大号)} 2(μ-N 2)] [BPH 4 ] 2(4)。4中的二氮配体很容易被一系列供体分子取代,形成相应的阳离子络合物[Cp * Ru(X)(L)] [BPh 4 ](X = MeCN 3,H 2 6,C 2 H 4 8a,CH 2 CHCOOMe 8b,CHPh 9)。尝试从MeNO 2 / EtOH溶液中重结晶4导致亚硝酰基衍生物[Cp * Ru(NO)(L)] [BPh 4 ] 2(5)的分离。所述allenylidene复杂的[Cp *Ru═C═C═CPh 2(大号)] [BPH 4 ](10)也