Cobalt-Catalyzed Alkylation of Secondary Alcohols with Primary Alcohols via Borrowing Hydrogen/Hydrogen Autotransfer
作者:Frederik Freitag、Torsten Irrgang、Rhett Kempe
DOI:10.1002/chem.201701211
日期:2017.9.7
noble metals in catalysis by earth abundant 3d metals, such as Mn, Fe, or Co, (nonprecious or base metals) is a related key concept with respect to sustainability. Here, we report on the first cobalt-catalyzed alkylation of secondary alcohols with primary alcohols. Easy-to-synthesize and easy-to-activate PN5P-pincer-ligand-stabilized Co complexes developed in our laboratory mediate the reaction most
酒精是有前途的可持续原材料,因为它们可以从丰富而难以消化的生物质中获得。在催化方面,用富含锰的3d金属(例如Mn,Fe或Co)(非贵金属或贱金属)代替昂贵的贵金属是与可持续性相关的关键概念。在这里,我们报道了仲醇与伯醇的首次钴催化烷基化反应。易于合成和易于激活的PN 5在我们的实验室中开发的P-pincer-配体稳定的Co络合物最有效地介导了反应。该催化作用适用于广泛的底物范围,并在相对温和的条件下进行。我们甚至已经证明了各种纯脂肪醇与碱或非贵金属催化剂的偶联。机理研究表明,该反应遵循借用氢或氢自动转移的概念。