37798-05-3Relevant academic research and scientific papers
Self-regulated catalysis for the selective synthesis of primary amines from carbonyl compounds
Gao, Mingxia,Jia, Xiuquan,Ma, Jiping,Fan, Xiaomeng,Gao, Jin,Xu, Jie
supporting information, p. 7115 - 7121 (2021/09/28)
Most current processes for the general synthesis of primary amines by reductive amination are performed with enormously excessive amounts of hazardous ammonia. It remains unclear how catalysts should be designed to regulate amination reaction dynamics at a low ammonia-to-substrate ratio for the quantitative synthesis of primary amines from the corresponding carbonyl compounds. Herein we show a facile control of the reaction selectivity in the layered boron nitride supported ruthenium catalyzed reductive amination reaction. Specifically, locating ruthenium to the edge surface of layered boron nitride leads to an increased hydrogenation activity owing to the enhanced interfacial electronic effects between ruthenium and the edge surface of boron nitride. This enables self-accelerated reductive amination reactions which quantitatively synthesize structurally diverse primary amines by reductive amination of carbonyl compounds with twofold ammonia. This journal is
From Benzofurans to Indoles: Palladium-Catalyzed Reductive Ring-Opening and Closure via β-Phenoxide Elimination
Perego, Luca A.,Wagschal, Simon,Grüber, Raymond,Fleurat-Lessard, Paul,El Ka?m, Laurent,Grimaud, Laurence
, p. 151 - 159 (2018/12/05)
Benzofurans can undergo ring-opening by a palladium-catalyzed process resulting in C?O bond breaking. Benzofuran-tethered 2-iodoanilines give synthetically interesting 2-(3-indolylmethyl)phenols in an overall reductive process. Mechanistic studies suggest that this unusual reaction proceeds by carbopalladation of benzofuran giving a 3-palladated 2,3-dihydrobenzofuran intermediate, which then fragments by an uncommon trans-elimination of the phenoxide group β to the metal. In this transformation, N,N-diisopropylethylamine (DIPEA) acts as a base and as a reducing agent: it regenerates palladium(0) from palladium(II), thus allowing catalytic turnover. (Figure presented.).
NHC-based coordination polymers as solid molecular catalysts for reductive amination of biomass levulinic acid
Sun, Zheming,Chen, Jiangbo,Tu, Tao
, p. 789 - 794 (2017/08/18)
A class of robust solid molecular NHC-based catalysts were readily fabricated via self-assembly from a p-phenylene-bridged bis-benzimidazolium salt with selected metal precursors. Among them, the NHC-Ru polymer demonstrated high catalytic activity and excellent stability as a solid molecular catalyst for the solvent-free reductive amination of biomass levulinic acid with inexpensive ammonium formate, furnishing a challenging unprotected 5-methyl-2-pyrrolidone quantitatively at a 0.15 mol% catalyst loading. The solid catalyst was readily recovered and reused for 37 runs without obvious loss of activity. Remarkably, a TON value up to 6.7 × 104 was achieved in a molar-scale reaction with a catalyst loading at 0.001 mol%. Inspired by the results of a preliminary mechanistic study, notably, one-pot tandem reductive reactions of LA with aldehydes or ketones were successfully developed, affording a variety of structurally intriguing and functional N-substituted 5-methyl-2-pyrrolidones in high chemo-selectivity with good to excellent yields.
A systematic exploration of the effects of flexibility and basicity on sigma (σ) receptor binding in a series of substituted diamines
Conroy, Trent,Manohar, Madhura,Gong, Yu,Wilkinson, Shane M.,Webster, Michael,Lieberman, Brian P.,Banister, Samuel D.,Reekie, Tristan A.,Mach, Robert H.,Rendina, Louis M.,Kassiou, Michael
, p. 9388 - 9405 (2016/10/13)
The sigma-1 receptor (S1R) has attracted a great deal of attention as a prospective drug target due to its involvement in numerous neurological disorders and, more recently, for its therapeutic potential in neuropathic pain. As there was no crystal structure of this membrane-bound protein reported until 2016, ligand generation was driven by pharmacophore refinements to the general model suggested by Glennon and co-workers. The generalised S1R pharmacophore comprises a central region where a basic amino group is preferred, flanked by two hydrophobic groups. Guided by this pharmacophore, S1R ligands containing piperazines, piperazinones, and ethylenediamines have been developed. In the current work, we systematically deconstructed the piperazine core of a prototypic piperazine S1R ligand (vide infra) developed in our laboratories. Although we did not improve the affinity at the S1R compared to the lead, we identified several features important for affinity and selectivity. These included at least one basic nitrogen atom, conformational flexibility and, for S1R, a secondary or tertiary amine group proximal to the anisole. Furthermore, S2R selectivity can be tailored with functional group modifications of the N-atom proximal to the anisole.
PHARMACEUTICAL COMPOSITION FOR TREATING OR PREVENTING GLAUCOMA
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Page/Page column 106, (2012/02/15)
The present invention is to provide a medical composition for the treatment or prophylaxis of glaucoma which comprises a pyridylaminoacetic acid compound represented by the formula (1): wherein R1, R2 and R3 each independe
PYRIDYLAMINOACETIC ACID COMPOUND
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Page/Page column 104, (2011/01/11)
The present invention provides a novel pyridylaminoacetic acid compound represented by the following formula (1): (wherein R1, R2, R3, Y and Z are as defined in the description and claims), or a pharmacologically acceptabl
Three-component one-pot process to propargylic amines and related amide and sulfonamide compounds: application to the construction of 2-(aminomethyl)benzofurans and indoles
Russo, Olivier,Messaoudi, Samir,Hamze, Abdallah,Olivi, Nathan?el,Peyrat, Jean-Fran?ois,Brion, Jean-Daniel,Sicsic, Sames,Berque-Bestel, Isabelle,Alami, Mouad
, p. 10671 - 10683 (2008/02/12)
An efficient palladium-copper-catalyzed three-component assembling of propargyl halides, aryl or heteroaryl halides, and secondary amines is described. A wide variety of tertiary propargylic amines were synthesized in good to excellent yields from easily accessible starting materials. This three-component assembling was also effective when using potassium phthalimide or di-tert-butyliminodicarbonate instead of secondary amines. Consequently, it provides a quick entry to N-protected propargylic amines suitable intermediates for the synthesis of primary and secondary propargylic amines. In a similar way, related compounds including propargylic amide, carbamate and sulfonamide derivatives were efficiently obtained. This catalytic domino three-component process has been applied successfully to the construction of functionalized 2-(aminomethyl)benzo[b]furan or indole derivatives of biological interest.
Design, synthesis, and evaluation of potential inhibitors of brassinin glucosyltransferase, a phytoalexin detoxifying enzyme from Sclerotinia sclerotiorum
Pedras, M. Soledade C.,Hossain, Mohammad
, p. 5981 - 5996 (2008/03/27)
Sclerotinia sclerotiorum is a fungal pathogen, which causes stem rot in crucifer crops and in several other plant families resulting in enormous yield losses all over the world. Brassinin is a phytoalexin produced by crucifer plants as part of a general d
ANTIPROLIFERATIVE 2-(SULFO-PHENYL)-AMINOTHIAZOLE DERIVATIVES
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Page 52, (2010/02/08)
Aminothiazole compounds substituted with sulfur-containing groups are represented by the Formula (I), and their pharmaceutically acceptable salts, prodrugs, active metabolites, and pharmaceutically acceptable salts of said metabolites are described. These agents modulate and/or inhibit the cell proliferation and activity of protein kinases and are useful as pharmaceuticals for treating malignancies and other disorders.
