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Concerted Catalysis in Tight Spaces: Palladium‐Catalyzed Allylation Reactions Accelerated by Accumulated Active Sites in Mesoporous Silica
Author(s) -
Motokura Ken,
Ikeda Marika,
Nambo Masayuki,
Chun WangJae,
Nakajima Kiyotaka,
Tanaka Shinji
Publication year - 2017
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201700439
Subject(s) - silanol , catalysis , mesoporous material , palladium , mesoporous silica , chemistry , heterogeneous catalysis , mcm 41 , amine gas treating , materials science , inorganic chemistry , organic chemistry
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.