1919-18-2Relevant academic research and scientific papers
A face-capped [Fe4L4]8+ spin crossover tetrahedral cage
Ferguson, Alan,Squire, Marie A.,Siretanu, Diana,Mitcov, Dmitri,Mathoniere, Corine,Clerac, Rodolphe,Kruger, Paul E.
, p. 1597 - 1599 (2013)
Reported here is a face-capped Fe(ii) molecular tetrahedron, [Fe 4L4](BF4)8, 1. Single crystal X-ray diffraction at 153 and 293 K suggest spin crossover (SCO) and variable temperature magnetic susceptibility measurements confirm 1 displays thermally driven SCO behaviour in the solid state and in dilute acetone solution centred around 284-288 K. The Royal Society of Chemistry 2013.
Self-assembly and steric hindrance for further host–guest interactions of a tetrahedral cage FeII4L4
Bu, Ning,Wu, Wen-Yuan,Jiang, Peng,Zhan, Zi-Yuan,Wan, Jin-Long,Wu, Zi-Jing,Wan, Rong
, p. 4493 - 4499 (2021)
In this paper, a novel complex [FeII4L4]8+ was designed and synthesized from subcomponent self-assembly of C3-symmetric 2,4,6-tris(4-aminophenoxy)triazine, 3-methylpyridine-2-carboxaldehyde and iron(II) trifluoromethanesulfonate in CH3CN solution. The structure of target compound was confirmed by 1H NMR and ESI-MS measurements as a tetrahedral cage, and the host–guest interactions between the complex and a series of guest molecules were studied. The results show that the intermolecular interactions are relatively weak by comparison with other similar ligand’s complexes, which may be due to the steric effect of methyl groups adjacent to the peripheral apertures of the cage.
Nickel-catalyzed reductive amidation of aryl-triazine ethers
Heravi, Majid M.,Panahi, Farhad,Iranpoor, Nasser
supporting information, p. 1992 - 1995 (2020/02/22)
The reaction of activated phenolic compounds, 2,4,6-triaryloxy-1,3,5-triazine (aryl-triazine ethers), with various isocyanates or carbodiimides in the presence of a nickel pre-catalyst resulted in the synthesis of aryl amides in good to excellent yields.
Nickel-Catalyzed Synthesis of N-(Hetero)aryl Carbamates from Cyanate Salts and Phenols Activated with Cyanuric Chloride
Dindarloo Inaloo, Iman,Esmaeilpour, Mohsen,Majnooni, Sahar,Reza Oveisi, Ali
, p. 5486 - 5491 (2020/09/04)
A simple and efficient domino reaction has been designed and employed for the one-pot synthesis of N-(hetero)aryl carbamates through the reaction between alcohols and in-situ produced (hetero)aryl isocyanates in the presence of a nickel catalyst. The phenolic C?O bond was activated via the reaction of phenol with cyanuric chloride (2,4,6-trichloro-1,3,5-triazine (TCT)) as an inexpensive and readily available reagent. This strategy provides practical access to N-(hetero)aryl carbamates in good yields with high functional groups compatibility.
Nickel-catalysed C–O bond reduction of 2,4,6-triaryloxy-1,3,5-triazines in 2-methyltetrahydrofuran
Wang, Yaoyao,Shen, Jun,Chen, Qun,Wang, Liang,He, Mingyang
, p. 409 - 412 (2018/10/02)
A nickel-catalysed reduction of phenol derivatives activated by 2,4,6-trichloro-1,3,5-triazine (TCT) in ecofriendly 2-methyltetrahydrofuran (2-MeTHF) is described. The phenol-TCT derivatives were readily prepared using grinding method in short time without further purification. This catalytic system allowed the facile C–O cleavage of phenol-TCT derivatives under mild reaction conditions with high efficiency and good functional group tolerance. Gram-scale reaction was also achieved. Particularly, sequential functionalization of phenol-TCT derivatives followed by C–O bond reduction could also be realized, affording the high value-added products in moderate to good yields.
Imine zinc s-triazine complex
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Paragraph 0009; 0013-0015, (2019/04/02)
The invention discloses an imine zinc s-triazine complex (I). The chemical formula of the imine zinc s-triazine complex (I) is shown in the description. The invention relates to the imine zinc s-triazine complex and a preparation method thereof. The imine zinc s-triazine complex is synthesized by self-assembly of p-triaminophenoxy s-triazine, zinc trifluoromethanesulfonate and 6-methylpyridine-2-formaldehyde under the effect of a sodium hexafluorophosphate ionic template.
Covalent organic frameworks: Efficient, metal-free, heterogeneous organocatalysts for chemical fixation of CO2 under mild conditions
Zhi, Yongfeng,Shao, Pengpeng,Feng, Xiao,Xia, Hong,Zhang, Yumin,Shi, Zhan,Mu, Ying,Liu, Xiaoming
supporting information, p. 374 - 382 (2018/01/12)
The cycloaddition of CO2 to epoxides to form cyclic carbonates is very promising and does not generate any side products. Metal-free, heterogeneous organocatalysts offer an environmentally friendly alternative to traditional metal-based catalysts. Herein two triazine-based covalent organic frameworks (COF-JLU6 and COF-JLU7) were successfully synthesized under solvothermal conditions. The structural and chemical properties of COFs were fully characterized by using powder X-ray diffraction analysis, structural simulation, Fourier transform infrared spectroscopy, 13C solid-state NMR spectroscopy, electron microscopy, thermogravimetric analysis and nitrogen adsorption. The two COF materials combine mesopores, high crystallinity and good stability, as well as a large number of hydroxy groups in the pore walls. They possess a high Brunauer-Emmett-Teller (BET) specific surface area up to 1390 m2 g-1 and a large pore volume of 1.78 cm3 g-1. The COF-JLU7 displays a high CO2 uptake of 151 mg g-1 at 273 K and 1 bar. Importantly, COF-JLU7 was found to be a highly effective catalyst to convert CO2 into cyclic carbonate through the cycloaddition reaction with epoxides under mild conditions. The effect of reaction parameters, such as reaction temperature, reaction time and CO2 pressure, on the catalytic performance was also investigated in detail. Moreover, the new framework-based catalyst can be recovered and reused five times without a significant loss of catalytic efficiency.
Chitosan-Supported Ni particles: An Efficient Nanocatalyst for Direct Amination of Phenols
Hajipour, Abdol R.,Abolfathi, Parisa
, (2018/02/21)
A practical method for the direct amination of phenols using 2,4,6-trichloro-1,3,5-triazine (TCT) as an efficient promotor for the activation of phenols in the presence of an efficient and recyclable heterogeneous catalyst prepared by immobilization of nickel particles on triazole modified chitosan is described. This heterogeneous catalyst has demonstrated a promising activity for the conversion of phenolic compounds to their corresponding amine under mild conditions. Moreover, the obtained catalyst can be reused in five consecutive runs with consistent catalytic activity.
Nickel-Catalyzed Deoxycyanation of Activated Phenols via Cyanurate Intermediates with Zn(CN)2: A Route to Aryl Nitriles
Heravi, Majid M.,Panahi, Farhad,Iranpoor, Nasser
supporting information, p. 2753 - 2756 (2018/05/22)
A novel, and efficient nickel-catalyzed deoxycyanation of phenolic compounds using relatively nontoxic Zn(CN)2 as the cyanide source was developed. The reaction of C-O bond activated phenolic compounds by 2,4,6-trichloro-1,3,5-triazine with Zn(CN)2 in the presence of a nickel precatalyst afforded the aromatic nitriles in good to excellent yields.
Nickel-catalyzed cyanation of phenol derivatives activated by 2,4,6-trichloro-1,3,5-triazine
Wang, Liang,Wang, Yaoyao,Shen, Jun,Chen, Qun,He, Ming-Yang
supporting information, p. 4816 - 4820 (2018/07/13)
A nickel-catalyzed cyanation of phenol derivatives activated by 2,4,6-trichloro-1,3,5-triazine (TCT) using aminoacetonitrile as the cyanating agent is described. This catalytic system delivered the desired products in moderate to good yields with good substrate compatibility. The readily available starting materials, cost-effective nickel catalyst and metal-free cyanating agent are the major features of the present method.
