manganese together with readily available aminotriazole ligands is reported. The new Mn(I) complexes are catalytically competent in transferhydrogenation of ketones with 2‐propanol as hydrogen source. The reaction proceeds under mild conditions at 80 °C for 20 h with 3 % of catalyst loading using either KOtBu or NaOH as base. Good to excellent yields were obtained for a wide substrate scope with broad functional
据报道,一种基于包含丰富且廉价的锰以及易于获得的氨基三唑配体的络合物的催化系统。新的Mn(I)配合物在以2-丙醇为氢源的酮类转移氢化中具有催化能力。该反应在 80 °C 的温和条件下进行 20 小时,催化剂负载量为 3%,使用 KO t Bu 或 NaOH 作为碱。对于具有广泛官能团耐受性的宽底物范围,获得了良好到优异的产率。通过改变配体的取代模式获得的结果与氢转移的外球机制一致。
A pH-Responsive Soluble-Polymer-Based Homogeneous Ruthenium Catalyst for Highly Efficient Asymmetric Transfer Hydrogenation (ATH)
acrylamide (DMAPA) and N-p-styrenesulfonyl-1,2-diphenylethylenediamine (V-TsDPEN). The pH-responsive polymer coordination rutheniumcomplex was thus prepared and employed as an efficientcatalyst for the asymmetric transferhydrogenation (ATH) of various ketones. The polymer catalyst exhibited an attractive pH-induced phase-separable behavior in water: it could be dissolved in water when the pH of the
Tuning lipase-catalysed kinetic resolution of 2-substituted thiophenes and furans: A scalable chemoenzymatic route to masked γ-bis-oxo-alcohols
作者:Dartagnan S.P. Ferreira、Jeiely G. Ferreira、Everaldo F.S. Filho、Jefferson L. Princival
DOI:10.1016/j.molcatb.2016.01.014
日期:2016.4
most of the chemically synthesized compounds are produced as racemates their kineticresolution has been of great interest. For this purpose a number of chemo-enzymatic approaches were proposed. One of such approaches, the use of isolated lipases, is a well-established alternative. Herein we report the kineticresolutions of 2-Substituted five-membered heteroaromatic rings. By optimizing the reaction
industry. Herein, we report a cationic Ru(II) complex intercalated into zirconium phosphate (ZrP) layers that enables the efficient catalytic conversion of furfural and other biomass-derived carbonyl compounds into the corresponding alcohols through selective hydrogenation of C=O group. The ZrP layers acted not only as a support for the Ru-complex, but also as the new ligands to tune the Ru(II) center