110-85-0Relevant articles and documents
Axial ligation of iron(III) porphyrin with a series of aliphatic bases: Piperazine, piperidine and pyrrolidine
Saffari,Khorasani-Motlagh,Noroozifar
, p. 128 - 132 (2012)
The binding of a series of nitrogen donor ligands (Piperazine (Pipz), Piperidine (Pip) and Pyrro- lidine (Pyr)) to iron porphyrin, OEPFeClO 4, where OEP is octaethylporphyrin, has been characterized by electronic spectroscopy in CH2Cl2. In nonaqueous media, in the presence of a neutral ligand, the equilibria observed are: OEPFeClO 4 + 2L [OEPFeL2]+ (β2) where the product is an ion pair and in some cases: OEPFeClO4 + L OEPFeLClO4 (K1), where the product may either be the six-coordinate or the five-coordinate [OEPFeL]+ ion pair, that L denotes neutral N-donor ligands. This behavior for the nitrogen donor ligands (L = Pipz, Pip, Pyr) is confirmed by spectrophotometric titrations data and the bind- ing constants for the substitution reaction have been reported. Pleiades Publishing, Ltd., 2012.
Cobalt-bridged secondary building units in a titanium metal-organic framework catalyze cascade reduction of N-heteroarenes
Feng, Xuanyu,Song, Yang,Chen, Justin S.,Li, Zhe,Chen, Emily Y.,Kaufmann, Michael,Wang, Cheng,Lin, Wenbin
, p. 2193 - 2198 (2019)
We report here a novel Ti3-BPDC metal-organic framework (MOF) constructed from biphenyl-4,4′-dicarboxylate (BPDC) linkers and Ti3(OH)2 secondary building units (SBUs) with permanent porosity and large 1D channels. Ti-OH groups from neighboring SBUs point toward each other with an O-O distance of 2 ?, and upon deprotonation, act as the first bidentate SBU-based ligands to support CoII-hydride species for effective cascade reduction of N-heteroarenes (such as pyridines and quinolines) via sequential dearomative hydroboration and hydrogenation, affording piperidine and 1,2,3,4-tetrahydroquinoline derivatives with excellent activity (turnover number ~ 1980) and chemoselectivity.
Intermolecular condensation of ethylenediamine to 1,4-diazabicyclo[2,2,2]octane over TS-1 catalysts
Wang, Yong,Liu, Yueming,Li, Xiaohong,Wu, Haihong,He, Mingyuan,Wu, Peng
, p. 258 - 267 (2009)
The intermolecular condensation of ethylenediamine (EDA) to 1,4-diazabicyclo[2.2.2]octane or triethylenediamine (TEDA) has been carried out over various titanosilicate catalysts. Superior to Ti-MWW, Ti-Beta, Ti-FER, and Ti-MOR, TS-1 showed higher EDA conversion and TEDA selectivity. The effects of reaction parameters, Ti content, and crystal size on the EDA condensation over TS-1 have been investigated. The mechanism for the TS-1-catalyzed condensation of EDA has also been considered. The acid sites, originated from the Si-OH groups adjacent to the "open" Ti sites, were assumed to contribute to the intermolecular condensation of EDA, whereas the Lewis acid sites directly related to Ti(IV) ions were not the true active sites. The primary intermolecular condensation of EDA to 1,4-diazacyclohexane or piperazine (PIP) took place mainly inside the micropores of the MFI structure, while the secondary condensation of PIP with EDA to TEDA was favored by the acid sites located near the pore entrance and on the outer surface of crystals.
Gas-phase pyrolysis in organic synthesis: A route for synthesis of cyanamides
Al-Awadi, Nouria A.,Abdelkhalik, Mervat Mohammed,El-Dusouqui, Osman M. E.,Elnagdia, Mohammad H.
, p. 207 - 209 (2010)
(Chemical Equation Presented) Pyrolysis of 1,7-di-[(E)-1- morpholinomethylidene]- and 1,7-di-[(E)-1-piperidino-methylidene]-4,6,10,12- tetramethylamino-2,8-dioxo-1,7-diaza-3,5,9,11-cyclododecatetraene-3, 9-dicarbonitrile 6a,b afforded pyridone 10 in addition to cyanamides 11a,b. On the other hand, pyrolysis of 1-[E-(4-(E-3-cyano-4,6-dimethyl-2-oxopyridin-1(2H)- ylimino) methylpiperazin-1-yl] methylenamino-4,6-dimethyl-2-oxo-1,2- dihydropyridine-3-carbonitrile 8 gave 1-amino-4,6-dimethyl-2-oxo-1,2- dihydropyridine-3-carbonitrile 13 as well as piperazine. The mechanism of pyrolysis and the effect of stereochemistry of pyrolyzed substrates on the nature of the pyrolysates are discussed.
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Avar,Kisch
, p. 89,91,95 (1978)
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Reactivity of borohydride incorporated in coordination polymers toward carbon dioxide
Kadota, Kentaro,Sivaniah, Easan,Horike, Satoshi
, p. 5111 - 5114 (2020)
Borohydride (BH4-)-containing coordination polymers converted CO2into HCO2-or [BH3(OCHO)]-, whose reaction routes were affected by the electronegativity of metal ions and the coo
Palladium supported on magnesium hydroxyl fluoride: An effective acid catalyst for the hydrogenation of imines and N-heterocycles
Agbossou-Niedercorn, Francine,Corre, Yann,Dongare, Mohan K.,Kemnitz, Erhard,Kokane, Reshma,Michon, Christophe,Umbarkar, Shubhangi B.
supporting information, p. 19572 - 19583 (2021/11/04)
Palladium catalysts supported on acidic fluorinated magnesium hydroxide Pd/MgF2-x(OH)x were prepared through precipitation or impregnation methods. Applications to the hydrogenation of various aldimines and ketimines resulted in good catalytic activities at mild temperatures using one atmosphere of hydrogen. Quinolines, pyridines and other N-heterocycles were successfully hydrogenated at higher temperature and hydrogen pressure using low palladium loadings and without the use of any acid additive. Such reactivity trend confirmed the positive effect of the Br?nsted and Lewis acid sites from the fluorinated magnesium hydroxide support resulting in the effective pre-activation of N-heterocycle substrates and therefore in the good catalytic activity of the palladium nanoparticles during the hydrogenations. As demonstrated in the hydrogenation of imines, the catalyst was recycled up to 10 times without either loss of activity or palladium leaching. This journal is
METHOD FOR THE PRODUCTION OF ETHYLENEAMINES
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Paragraph 0336-0352, (2020/05/14)
The present invention relates to a process for preparing alkanolamines and/or ethyleneamines in the liquid phase, by reacting ethylene glycol and/or monoethanolamine with ammonia in the presence of an amination catalyst comprising Co, Ru and Sn.
Catalytic reduction of aromatic ring in aqueous medium
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Page/Page column 10; 16, (2020/05/04)
A method of reducing an aromatic ring under relatively mild condition using sub-nano particles of a transition metal supported on super paramagnetic iron oxide nanoparticles (SPIONs). The catalyst is efficient for catalyzing the reduction of both carbocyclic and heterocyclic compound. In compound comprising both carbocyclic and heterocyclic aromatic rings, the catalyst displays high regioselectivity for the heterocyclic ring.