Concerted Catalysis in Tight Spaces: Palladium‐Catalyzed Allylation Reactions Accelerated by Accumulated Active Sites in Mesoporous Silica. Issue 15 (21st June 2017)

• Record Type: Journal Article
• Authors: Motokura, Ken; Ikeda, Marika; Nambo, Masayuki; Chun, Wang‐Jae; Nakajima, Kiyotaka; Tanaka, Shinji
• Is Part Of: ChemCatChem. Volume 9:Issue 15(2017)
• Page Start: 2924
• Page End: 2929
• Publication Date: 2017-06-21
• Subjects: allylation -- concerted catalysis -- mesoporous materials -- palladium -- supported catalysts; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201700439
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: The surface of mesoporous silica was modified with a Pd–bisphosphine complex and/or a tertiary amine group for concerted acceleration of allylation reactions. Mesoporous‐silica‐supported catalysts with a 1.6 nm pore diameter showed higher performance than nonporous or larger mesoporous silica‐supported catalysts owing to the accumulation of active sites into a confined space. For the case in which allyl alcohol was used in the reaction, the presence of a silanol group on the surface was quite effective: the turnover number of Pd was nine times greater than that of the homogeneous Pd complex. Abstract : In concert : Concerted catalysis between the Pd complex and tertiary amine/silanol in mesoporous silica enables the highly efficient allylation of nucleophiles with allyl methyl carbonate, allyl acetate, and also allyl alcohol.