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题名: L-Prolinamide functionalized mesoporous silicas: Synthesis and catalytic performance in direct aldol reaction
作者: Gao, Jinsuo1;  Liu, Jian1;  Jiang, Dongmei1;  Xiao, Bing1;  Yang, Qihua1
关键词: Mesoporous silicas ;  Aldol reaction ;  Chiral ;  Prolinamide
刊名: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
发表日期: 2009-11-02
DOI: 10.1016/j.molcata.2009.08.005
卷: 313, 期:1-2, 页:79-87
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Mesoporous silicas functionalized with the L-prolinamide group in the mesopore were synthesized by co-condensation of silicon precursors with L-prolinamide modified organosilane (PCA) in HOAc-NaOAc buffer solution (pH = 4.4) using block copolymer P123 as a template. The highly ordered 2D hexagonal mesostructure was obtained through one-pot co-condensation of tetraethoxysilane (TEOS), Na(2)SiO(3) and PCA as silicon source. The disordered foam-like mesostructure was also obtained when TEOS and PCA were used as silicon sources. In asymmetric aldol reaction of cyclohexanone with 4-niti-obenzaldehyde, the materials with highly ordered mesostructure exhibit higher enantioslectivity (91% ee) than that with disordered foam-like mesostructure (75% ee), suggesting that the ordered pore structure imparts improved enantioselectivity. The L-prolinamide functionalized materials were also synthesized by grafting PCA onto mesoporous silicas. which showed catalytic efficiencies similar to the materials synthesized by the co-condensation method. (C) 2009 Elsevier B.V. All rights reserved.
关键词[WOS]: ASYMMETRIC DIRECT ALDOL ;  ORGANOSILICAS ;  ORGANOCATALYST ;  TRANS-(1R,2R)-DIAMINOCYCLOHEXANE ;  KETONES
语种: 英语
WOS记录号: WOS:000270893600012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141463
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Gao, Jinsuo,Liu, Jian,Jiang, Dongmei,et al. L-Prolinamide functionalized mesoporous silicas: Synthesis and catalytic performance in direct aldol reaction[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2009,313(1-2):79-87.
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