137376-38-6Relevant articles and documents
Functionalised mesoporous silica: A good opportunity for controlled peptide oligomerisation
Subra, Gilles,Mehdi, Ahmad,Enjalbal, Christine,Amblard, Muriel,Brunel, Luc,Corriu, Robert,Martinez, Jean
, p. 6321 - 6326 (2011)
In this paper, mesoporous organosilicas functionalised with aminopropyl groups have been successfully used for peptide oligomerisation. For this purpose, three mesoporous silica SBA-15 type containing different amounts of aminopropyl groups were prepared
Synthesis of large-pore ordered mesoporous silicas containing aminopropyl groups
Mehdi, Ahmad,Reye, Catherine,Brandes, Stephane,Guilard, Roger,Corriu, Robert J. P.
, p. 965 - 968 (2005)
Ordered mesoporous silicas with large-pore diameters incorporating aminopropyl groups in variable quantity have been synthesized via the co-condensation of tetraethyl orthosilicate (TEOS) and 3-tert- butyloxycarbonylaminopropyltriethoxysilane templated wi
A reliable method to create adjacent acid-base pair sites on silica through hydrolysis of pre-anchored amide
Kim, Wontae,Casalme, Loida O.,Umezawa, Taiki,Matsuda, Fuyuhiko,Otomo, Ryoichi,Kamiya, Yuichi
, p. 71 - 74 (2020)
A method to create adjacent acid-base pair sites, which are carboxyl and amino groups, respectively, on silica through hydrolysis of pre-anchored amide is proposed. This method can produce an adjacent acid-base pair site. The catalyst showed excellent catalytic performance for aldol condensation of 4-nitrobenzaldehyde with acetone, overwhelming the catalyst having only amino group and an acid-base catalyst prepared in a conventional manner.
Synthesis of hexagonal mesoporous silicates functionalized with amino groups in the pore channels by a co-condensation approach
Li, Yunping,Xiong, Wei,Wang, Chun,Song, Bo,Zhang, Guolin
, p. 53991 - 54000 (2016)
Mesoporous silicates functionalized with amino groups in the pore channels have been made by the co-condensation of tetraethoxyl siloxide (TEOS) with precursors of P-Si through a triblock copolymer-templated sol-gel process under acidic conditions. Poly(alkylene oxide) block copolymer (P123) was eluted by ethanol extraction and template molecules were removed by refluxing the materials in a mixture of DMSO and water. The resulting materials were characterized in detail by FT-IR, XRD, TEM and N2 adsorption, in order to study the effect of the precursors on the mesoscopic order and pore structure. Evidence of amino groups located in the pore channels was shown through variation of pore size and BET surface area after the amino groups were coupled with benzaldehyde, and TEM images of materials after staining with RuO4. Finally, a comparative study of the catalytic performance of materials SBA-Am-10 and SBA-T-10, obtained by two methods, revealed that the catalyst synthesized by our method gave rapid reaction speed and high yields of flavanone by the Claisen-Schmidt condensation of benzaldehyde and 2′-hydroxyacetophenone.
A yolk-shell nanoreactor with a basic core and an acidic shell for cascade reactions
Yang, Yan,Liu, Xiao,Li, Xiaobo,Zhao, Jiao,Bai, Shiyang,Liu, Jian,Yang, Qihua
supporting information, p. 9164 - 9168 (2012/11/07)
Smart yolk-shell nanoparticles (hollow nanoparticles with a movable core) with an acidic shell and a basic core were fabricated through an organosilane-assisted selective etching method and acted as efficient nanoreactors for catalyzing a deacetalization-Henry cascade reaction with high activity and high selectivity. This strategy is very promising for the design of multifunctional nanoreactors for cascade reactions. Copyright
Carbamate silicon compounds as latent coupling agents and process for preparation and use
-
, (2008/06/13)
Novel tert-alkyl carbamate silicon compounds are provided which are useful as coupling agents. The compounds have the formulas: STR1 wherein the R groups can represent various hydrocarbon and other groups, n has a value of 1 to 10, b has a valueof from 2 to 5 and a has a value of 1, 2 or 3. Processes are also provided for the preparation of the carbamate compounds and their use as coupling agents.