18731-47-0Relevant articles and documents
Synthesis of N,O-type inherently chiral calix[4]arenes substituted on the lower rim and their organocatalysis properties
Chang, Ming-Liang,He, Yong,Zhou, Jing,Li, Shao-Yong
, p. 1363 - 1370 (2017)
This work presented the first study of organocatalytic behaviors of inherently chiral calix[4] arenes substituted at the lower rim. A pair of N,O-type enantiomers based on inherently chiral calix[4]arenes substituted at the lower rim were readily synthesi
Not all nitrogen atoms are equal: Contribution of peripheral versus internal amines to the observed reactivity and capture properties of melamine dendrons on SBA-15
Lou,Shantz
, p. 567 - 570 (2018)
The role of different nitrogen atoms in melamine dendrons tethered to SBA-15 is elucidated. For the nitroaldol (Henry) reaction all nitrogen atoms of the capping group participate in the reaction. For metal binding, uptake correlates with the diamine cont
Phenylalanine-Derived Imidazolines Bearing Heteroaromatic Pendants: Synthesis, Characterization, and Application in the Asymmetric Henry Reaction
Tydlitát, Ji?í,Bure?, Filip,R??i?ková, Zdeňka
, p. 1351 - 1363 (2015)
Starting from L-phenylalanine, (2S)-3-phenylpropane-1,2-diamine has been prepared and used as building block for the construction of the imidazoline ring. Four new optically pure NH-imidazolines bearing different six-membered heteroaromatic substituents o
Catalytic properties of dendron-OMS hybrids
Wang, Qingqing,Guerrero, Victor Varela,Ghosh, Anirban,Yeu, Seunguk,Lunn, Jonathan D.,Shantz, Daniel F.
, p. 15 - 25 (2010)
The synthesis and catalytic testing of several dendron-ordered mesoporous silica hybrids are reported. These materials are active in both the nitroaldol (Henry) reaction and the transesterification of glyceryl tributyrate to afford methyl esters. In both reactions it is observed that dendrons terminated with primary amines are more catalytically active than samples containing dendrons terminated with secondary amines. On a mmol nitrogen per gram of silica basis, the first generation dendrons are the most active for both chemistries, and the SBA-15 samples display a higher activity than the MCM-41 samples. The pore-size effect observed is consistent with significant diffusion resistance in the MCM-41 samples. The activity trend observed in the SBA-15 materials is consistent with decreased cooperative effects between the amines and surface silanols as the dendrons become larger. Clear trends are observed indicating that higher generation dendrons are more selective to alcohol formation in the Henry reaction. The dendron catalysts are much more active and stable than simple amines attached to silica in the transesterification of triglycerides. Preliminary results shown indicate that these materials can also catalyze more demanding chemistries, an example of which is the Aldol condensation of 5-(hydroxymethyl)furfural and acetone. The results shown indicate that dendron-OMS hybrids can serve as effective solid base catalysts for a diverse range of chemistries.
General acid and base bifunctional graphene oxide for cooperative catalysis
Zhang, Wenfeng,Gu, Hanying,Li, Zhen,Zhu, Yuanzhi,Li, Yang,Zhang, Guoliang,Zhang, Fengbao,Fan, Xiaobin
, p. 10239 - 10243 (2014)
In this study, a bifunctional graphene oxide material (GO-AEP-UDP) with a general acid, the ureidopropyl (UDP) group, and a general base, the 3-[2-(2-aminoethylamino)ethylamino]-propyl (AEP) group, was synthesized by silylanization of graphene oxide (GO)
Method for preparing 2-nitroalkyl-1-alcohol compound and application thereof
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Paragraph 0063-0078, (2021/04/14)
The invention relates to a method for preparing a 2-nitroalkane-1-alcohol compound and application thereof, and particularly provides a method for preparing the 2-nitroalkane-1-alcohol compound from iron powder/lead dichloride. The process has the advantages of good yield, high diastereoselectivity, wide functional group tolerance and good compatibility.
Synthesis of nitroaldols through the Henry reaction using a copper(II)–Schiff base complex anchored on magnetite nanoparticles as a heterogeneous nanocatalyst
Parandeh-Khoozani, Niloufar,Moradian, Mohsen
, p. 2035 - 2054 (2021/05/21)
A Cu(II)-Schiff base complex supported on functionalized Fe3O4 magnetic nanoparticles (MNPs@Salen-Cu(II)) was obtained as a new heterogeneous nanocatalyst. The nanocomposite materials were characterized by vibrating sample magnetometer (VSM), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FT-IR), and thermogravimetric analysis (TGA). The catalyst was used in the Henry reaction in order to accomplish one-pot synthesis of nitroaldol derivatives in green conditions. This nanocatalyst can be easily separated from media of reaction using an external magnet and reused several times without loss of its catalytic activity. Furthermore, the non-toxicity of the catalysts and the high yield of the products are other advantages of this method.
