Catalysis Communications ( IF 3.4 ) Pub Date : 2020-01-23 , DOI: 10.1016/j.catcom.2020.105944 Maciej Zaranek , Jakub Robaszkiewicz , Iwona Janica , Regis M. Gauvin , Piotr Pawluć , André Mortreux
A systematic study on the use of silanols and phenols as effective activators in Mo(CO)₆ – based catalytic systems for metathesis of 4-decyne and 1-phenyl-1-propyne is reported. In comparison with traditionally used phenols, aryl-substituted silanols exhibit high activating potential of molybdenum species even at lower concentrations (2 mol% of Mo(CO)₆ and 4–20 mol% of silanol depending on the alkyne) at toluene reflux. Silylated phenols and silanols are also suitable as co-catalysts. Additionally, Mo(CO)₆/silanol catalytic system is shown to be efficiently activated by UV-irradiation at room temperature, whereas it is less effective for metathesis reactions performed in the presence of phenols.
中文翻译:
用于炔烃复分解的基于Mo(CO)₆的原位催化剂:热和光化学活化下硅烷醇与苯酚的助催化剂
有系统地研究了在基于Mo(CO)3的催化体系中使用硅烷醇和苯酚作为有效活化剂进行4-癸炔和1-苯基-1-丙炔复分解的研究。与传统使用的苯酚相比,芳基取代的硅烷醇即使在甲苯回流下浓度较低时(钼(CO)3为2 mol%,而炔烃为4-20 mol%)也具有较高的钼活化活性。甲硅烷基化的酚和硅烷醇也适合作为助催化剂。另外,Mo(CO)3 /硅烷醇催化体系显示出在室温下被紫外线辐射有效地活化,而对于在苯酚存在下进行的复分解反应则不太有效。