4.6 Article

In situ Mo(CO)6-based catalysts for alkyne metathesis: Silanols vs phenols as co-catalysts under thermal and photochemical activation

期刊

CATALYSIS COMMUNICATIONS
卷 138, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.catcom.2020.105944

关键词

Alkyne metathesis; Molybdenum; Phenols; Silanols; Photochemical activation

资金

  1. National Science Centre (Poland) [UMO-2017/25/N/ST5/00193]
  2. Ministry of Foreign Affairs of France
  3. Universite des Sciences et Technologies of Lille
  4. CNRS
  5. Ministry of higher Education
  6. Institut Universitaire de France

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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.

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