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Relevant academic research and scientific papers

Gold(I) complexes bearing ring-fused benzoxazine-derived triazolylidenes and their use in C–N bond-forming processes

We report the synthesis and full characterization of a novel series of ring-fused benzoxazine-derived triazolium salts (1a–c) and their corresponding triazolylidene gold(I) complexes (2a–c). All new compounds were fully characterized by means of 1H and 13C NMR spectroscopy, elemental analyses, and mass spectroscopy and in the case of triazoliums 1a and 1b by single-crystal X-ray diffraction. The new triazolylidene gold complexes (2a–c) were tested as precatalysts in the hydroamination and hydrohydrazination of terminal alkynes employing aniline derivatives and hydrazine as nitrogen sources, respectively.

Hydroamination reactions catalyzed by [Au2(μ-Cl)(μ-bis(phosphino)ferrocene)][BArF24]

1,1′-bis(phosphino)ferrocene ligands are commonly employed in a variety of catalytic systems. These ligands are of particular interest as the steric and electronic properties of the phosphorus donor atoms can be altered by changing the substituents of the

Pyridine Wingtip in [Pd(Py-tzNHC)2]2+ Complex Is a Proton Shuttle in the Catalytic Hydroamination of Alkynes

The cationic palladium(II) complex 1 of pyridyl-mesoionic carbene ligand catalyzes Markovnikov-selective intermolecular hydroamination between anilines and terminal alkynes into the corresponding imines. The reaction proceeds at room temperature, in the a

HΒ Catalyzed Condensation Reaction Between Aromatic Ketones and Anilines: To Access Ketimines (Imines)

Abstract: A simple approach for the formation of imines by condensation of ketones and anilines over heterogeneous catalyst (Hβ zeolite) has been successfully developed. The present catalytic system scope was explored for various aromatic ketones and anil

Palladium-catalyzed aerobic oxidative hydroamination of vinylarenes using anilines: A wacker-type amination pathway

A palladium-catalyzed intermolecular hydroamination of vinylarene derivatives using anilines has been developed for the first time under aerobic conditions, where the regioselective formation of N-arylketimines is accomplished. The current aerobic oxidative hydroamination pathway of anilines is distinct from that of palladiumcatalyzed hydroamination reactions that proceed to give sec-arylethylamine and arylethylamine derivatives, identifying a longstanding missing reaction pathway, Wacker-type amination, to N-arylketimines using anilines. The ready availability of both starting materials, vinylarenes and anilines, offers an attractive and facile synthetic route to N-arylketimines in good to excellent yields.

Large Cu i 8 chalcogenone cubic cages with non-interacting counter ions

Two mega size copper(i) cubic cages, [{Cu(Bptp)1.5}8(PF6-)](PF6-)7 (1) and [{Cu(Bpsp)1.5}8(PF6-)](PF6-)7 (2), supported by imidazole-2-chalcogenone ligands (Bptp = 2,6-bis(1-isopropylimidazole-2-thione)pyridine and Bpsp = 2,6-bis(1-isopropylimidazole-2-selone)pyridine) have been synthesized and characterized. The formation of ionic salts 1 and 2 was confirmed by FT-IR, multinuclear (1H, 13C, 31P and 19F) NMR, UV-vis, TGA, CHN analysis, BET analysis, single crystal X-ray diffraction and powder X-ray diffraction techniques. To the best of our knowledge, these are the first examples of a octanuclear copper(i) cluster in a perfect cubic architecture with a copper-copper distance of 8.413 ? or 8.593 ?. Interestingly, these anion-centered CuI8 cubic arrangements are not supported by cubic centered ions or face centered molecules. The formation of cationic cubic cages was accompanied by the association of twelve ligands (Bptp or Bpsp) with eight trigonal planar [CuSe3] vertices. The cationic charge of cubic cages was satisfied by eight PF6- counter anions, in which one of the PF6- anions occupies the centre of the Cu8 cube without any interaction. The copper(i) cubic cages are found to be highly active catalysts in click chemistry as well as hydroamination reactions. The scope of the catalytic reactions has been investigated with thirty-five different combinations of click reactions and six different combinations of the hydroamination of alkynes.

Synthesis and Catalytic Benefits of Tetranuclear Gold(I) Complexes with a C4-Symmetric Tetratriazol-5-ylidene

The facile preparation of a C4-symmteric tetratriazolium salt and its subsequent metalation to generate a series of tetranuclear mesoionic carbene gold(I) complexes is presented. The complete structural characterization of the metallic carbenes

Zirconium complexes stabilized by amine-bridged bis(phenolato) ligands as precatalysts for intermolecular hydroamination reactions

A series of zirconium complexes bearing amine-bridged bis(phenolato) ligands of different steric and electronic properties have been synthesized, and their activities in catalyzing intermolecular hydroamination reactions have been studied and compared. In

Phosphinimino-amino magnesium complexes: Synthesis and catalysis of heteroselective rop of rac -lactide

Alkane elimination reactions of phosphinimino-amine ligands HL 1-8 ((2,6-Me2-C6H3NH)C(Ph)i - CHPPh2(NAr) (Ar = C6H5 (HL1); 2,6-Me2-C6H3/sub

Platinum(II) complexes with thioether-functionalized benzimidazolin-2- ylidene ligands: Synthesis, structural characterization, and application in hydroelementation reactions

A series of six benzimidazolium salts with an alkyl-alkyl thioether moiety in the side chain has been synthesized. While it was impossible to obtain the platinum(II) complexes by direct reaction between ligand precursors and basic platinum salts, the mild