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Mesoporous Organosilicas with Acidic Frameworks and Basic Sites in the Pores: An Approach to Cooperative Catalytic Reactions
Author(s) -
Shylesh Sankaranarayanapillai,
Wagener Alex,
Seifert Andreas,
Ernst Stefan,
Thiel Werner R.
Publication year - 2010
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200903985
Subject(s) - bifunctional , benzaldehyde , catalysis , mesoporous organosilica , mesoporous silica , mesoporous material , phenylene , amine gas treating , acetal , benzene , materials science , chemistry , chemical engineering , organic chemistry , polymer , engineering
Two in one : A periodic mesoporous phenylene silica (PMO) with acidic framework walls and basic pore channels was obtained by using protecting‐group techniques. This approach allows location of the acidic groups in the hydrophobic benzene layers and of the amine groups in the hydrophilic silica layers. The bifunctional material is an efficient catalyst for the tandem conversion of benzaldehyde dimethyl acetal into 2‐nitrovinylbenzene (see scheme).