Porous magnesium carboxylate framework: synthesis, X-ray crystal structure, gas adsorption property and heterogeneous catalytic aldol condensation reaction

2012 ◽  
Vol 41 (24) ◽  
pp. 7399 ◽  
Author(s):  
Debraj Saha ◽  
Rupam Sen ◽  
Tanmoy Maity ◽  
Subratanath Koner
Keyword(s):  
Crystal Structure ◽  
Gas Adsorption ◽  
Aldol Condensation ◽  
Adsorption Property ◽  
Condensation Reaction ◽  
X Ray ◽  
Heterogeneous Catalytic ◽  
Porous Magnesium

scholarly journals SYNTHESIS, CRYSTAL STRUCTURE, MAGNETIC PROPERTY, AND N2-GAS-ADSORPTION PROPERTY OF DINUCLEAR COPPER(II) 3,4,5-TRIMETHOXYBENZOATE

2017 ◽  
Vol 5 (sp.is.1) ◽  
pp. 103-110
Author(s):  
Masahiro Mikuriya ◽  
Chihiro Yamakawa ◽  
Kensuke Tanabe ◽  
Daisuke Yoshioka ◽  
Ryoji Mitsuhashi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Property ◽  
Gas Adsorption ◽  
Adsorption Property ◽  
Dinuclear Copper ◽  
N2 Gas Adsorption

scholarly journals Dinuclear Copper(II) 3,4,5-Tri-O-benzylgallate

2019 ◽  
Vol 6 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Masahiro Mikuriya ◽  
Chihiro Yamakawa ◽  
Naoyuki Masuda ◽  
Daisuke Yoshioka ◽  
Sayuri Yamaguchi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Total Synthesis ◽  
Temperature Dependence ◽  
Gas Adsorption ◽  
Adsorption Property ◽  
Copper Acetate ◽  
Xrd Analysis ◽  
Carboxylate Ligand ◽  
Dinuclear Copper ◽  
Carboxylate Complex

Background:Ellagitannins have attracted much attention because of the biological and pharmacological activities. In the total synthesis of ellagitannins, 3,4,5-tri-O-benzylgallic acid has been a key compound to introduce the protected galloyl group. From the perspective of coordination chemistry, 3,4,5-tri-O-benzylgallic acid is an interesting carboxylate ligand which might be capable of dinuclear carboxylate complex. Such a dinuclear carboxylate complex might be interesting as a new example of copper acetate type complexes.Objectives:The objective of the work is to synthesize a copper acetate type complex by using 3,4,5-tri-O-benzylgallic acid and to see a new feature of copper acetate compounds, by elucidating the crystal structure, magnetic property, and adsorption property for N2gas.Methods:Copper(II) 3,4,5-tri-O-benzylgallate has been synthesized by a reaction of 3,4,5-tri-O-benzylgallic acid and copper(II) nitrate at pH=9 condition. The isolated complex was characterized using single-crystal X-ray structure analysis, XRD analysis, UV-visible spectroscopy, IR spectroscopy, and temperature dependence of magnetic susceptibility.Results:The crystal structure shows a crystallographically centrosymmetric dinuclear molecule with four carboxylato-bridges and axial dimethylformamide molecules and crystal dmf molecules [Cu···Cu 2.6345(12) Å]. In the crystal, 1D supramolecular assembly by π-π interaction between the benzyl aromatic rings of dinuclear molecules was observed. Temperature dependence of magnetic susceptibilities showed a considerable antiferromagnetic interaction between the two copper(II) ions (2J = –214 cm–1). Type-II gas-adsorption property was observed for N2.Conclusion:A key-compound for the total synthesis of ellagitannins, 3,4,5-tri-O-benzylgallic acid (Htbng), was shown to be a new ligand for the synthesis of dinuclear copper acetate analogue with a lantern-type core, extending the realm of copper acetate clusters.

Crystal Structure and Gas Adsorption Property of Rhodium(II) Benzoate Pyrazine

2002 ◽  
Vol 31 (12) ◽  
pp. 1208-1209 ◽  
Author(s):  
Satoshi Takamizawa ◽  
Taku Hiroki ◽  
Ei-ichi Nakata ◽  
Katsura Mochizuki ◽  
Wasuke Mori
Keyword(s):  
Crystal Structure ◽  
Gas Adsorption ◽  
Adsorption Property

A CaMnAl-hydrotalcite solid basic catalyst toward the aldol condensation reaction with a comparable level to liquid alkali catalysts

2018 ◽  
Vol 20 (13) ◽  
pp. 3071-3080 ◽  
Author(s):  
Weihan Bing ◽  
Huimin Wang ◽  
Lei Zheng ◽  
Deming Rao ◽  
Yusen Yang ◽  
...  
Keyword(s):  
Memory Effect ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Catalytic Performance ◽  
Basic Catalyst ◽  
Heterogeneous Catalytic ◽  
Comparable Level ◽  
Alkali Catalysts ◽  
Solid Basic Catalyst

A CaMnAl-hydrotalcite solid basic catalyst was prepared based on the memory effect of LDHs, which exhibited extremely high heterogeneous catalytic performance toward the aldol condensation reaction.

Syntheses of Pyrazolo-, Isoxazolo-, Pyrido- and Pyrimido-Carbazoles from 2-(3′,4′-Dimethoxybenzylidene)-2,3,4,9-Tetrahydrocarbazol-1-Ones

2008 ◽  
Vol 2008 (10) ◽  
pp. 572-577 ◽  
Author(s):  
Makuteswaran Sridharan ◽  
Lucas K. Beagle ◽  
Matthias Zeller ◽  
Karnam Jayarampillai Rajendra Prasad
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Hydrazine Hydrate ◽  
Aldol Condensation ◽  
Hydroxylamine Hydrochloride ◽  
Molecular And Crystal Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Guanidinium Nitrate

Mixed aldol condensation of 2,3,4,9-tetrahydrocarbazol-1-ones with 3,4-dimethoxybenzaldehyde (veratraldehyde) yielded 2-(3′,4′-dimethoxybenzylidene)-2,3,4,9-tetrahydrocarbazol-1-ones. These enones on reaction with hydrazine hydrate, hydroxylamine hydrochloride, malononitrile and guanidinium nitrate under different conditions yielded the corresponding pyrazolo[3,4-a]-, isoxazolo[3,4-a]-, pyrido[2,3-a]-, and pyrimido[4,5-a]-carbazoles respectively. The molecular and crystal structure of 2-(3′,4′-dimethoxybenzylidene)-2,3,4,9-tetrahydro-1H-carbazol-1-one resolved by single crystal X-ray diffraction is discussed.

Synthesis and Crystal Structure Hindered Amine with Methaerylate

2015 ◽  
Vol 1095 ◽  
pp. 381-384
Author(s):  
Wei Wei Xue ◽  
Xiu Qin Zhang ◽  
Qiang Chen ◽  
Ji Jin ◽  
Guo Yuan Lu
Keyword(s):  
Crystal Structure ◽  
Methacrylic Acid ◽  
Condensation Reaction ◽  
Crystallographic Analysis ◽  
Synthesis And Crystal Structure ◽  
X Ray

The high pure hindered amine with methaerylate (2,2,6,6-tetramethylpiperidin-4-yl methacrylate) 4 was synthesized by a condensation reaction of 2,2,6,6-tetramethylpiperidin-4-ol and methacrylic anhydride via isolation of the salt (1:1) of 4 and methacrylic acid in an improved yield (total 80%). The structure of the salt 4 of hindered amine was demonstrated by X-ray crystallographic analysis.

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