1739-00-0Relevant academic research and scientific papers
β-phenylethylamines, indolines and isoquinolones via hydroamination of styrenes by microwave irradiation
Seijas,Vázquez-Tato,Martínez
, p. 875 - 877 (2001)
Microwave irradiation promotes hydroamination of styrenes. This method can be used as a direct way of producing different kinds of bioactive compounds: open chain compounds like β-phenylethylamines or cyclized products like indolines or isoquinolones.
Rhodium-mediated 100% regioselective oxidative hydroamination of α-olefins
Brunet,Neibecker,Philippot
, p. 3877 - 3880 (1993)
The system generated from lithium anilide and [(Et3P)2RhCl]2 caralyzes (turnover 21) the regioselective condensation of aniline with styrene to give a mixture of PhNH-CH(CH3)Ph (hydroamination product) and PhN=C(CH3)Ph (oxidative hydroamination product) in c.a. 1/2 ratio. This 100% regioselective oxidative hydroamination has been confirmed in the case of 1-hexene.
Anti-Markovnikov hydroaminations of styrene catalyzed by palladium(II) N-heterocyclic carbene complexes under conventional and microwave heating
G?k, Yetkin,Yi?it, Beyhan,?zero?lu ?elikal, ?zlem,Yi?it, Murat
, p. 591 - 596 (2018)
Six palladium(II) complexes with benzimidazole-based N-heterocyclic carbene ligands were synthesized by transmetallation reactions between silver(I) N-heterocyclic carbene complexes and PdCl2(PhCN)2. The complexes were characterized by physicochemical and spectroscopic methods. The palladium complexes were tested as catalysts for intermolecular hydroamination reactions of styrene with various anilines in ionic liquids under both conventional and microwave heating. All of these complexes proved to be catalytically active in these reactions. The anti-Markovnikov addition products were selectively obtained by using 1?mol% of the palladium complex.
Markownikoff and anti-Markownikoff hydroamination with palladium catalysts immobilized in thin films of silica supported ionic liquids
Jimenez, Oriol,Mueller, Thomas E.,Sievers, Carsten,Spirkl, Andreas,Lercher, Johannes A.
, p. 2974 - 2976 (2006)
The concept of immobilising organometallic complexes in a thin film of supported ionic liquids was utilised to synthesise novel bi-functional catalysts combining soft Lewis acidic and strong Bronsted acidic functions; the materials showed exceptional catalytic activity for the addition of aniline to styrene, providing the Markownikoff product under kinetically controlled conditions and mainly the anti-Markownikoff product in the thermodynamic regime. The Royal Society of Chemistry 2006.
Titanium amido- and imido-complexes supported by a tridentate pyrrolyl ligand: Syntheses, characterisation and catalytic activities
Chen, Zhou,Li, Lei,Chen, Yanmei,Hu, Bin,Wu, Jian,Wang, Xiufang,Lei, Tao,Li, Yahong
, p. 249 - 253 (2012)
The complexes [Ti(NMe2)2(pmpmi)] [H2pmpmi = (2-pyrrolylmethene)-(2-pyrrolylmethyl)imine], [Ti(NtBu)(pmpmi)(py) 2], [Ti(NtBu)(pmpmi)(dpy)] and [Ti(NPh)(pmpmi)(py) 2] have been prepared, characterised and shown to be pre-catalysts for the hydroamination of phenylacetylene with aniline and p-chloroaniline. The X-ray structures of [Ti(NMe2)2(pmpmi)], [Ti(N tBu)(pmpmi)(dpy)] and [Ti(NPh)(pmpmi)(py)2] have been determined.
Dibutyltin chloride hydride complex as a novel reductant for chemoselective reductive amination
Shibata, Ikuya,Suwa, Toshihiro,Sugiyama, Erika,Baba, Akio
, p. 1081 - 1082 (1998)
Imine-selective reducing agent Bu2SnClH-HMPA (I) performed effective reductive amination of carbonyl compounds. Various functionalized amines could be prepared in a one-pot procedure. Noteworthy is that highly chemoselective reactions were achieved with the co-existence of other functionalities such as halogen, carbon-carbon double bond and hydroxyl groups.
A base-free Chan–Lam reaction catalyzed by an easily assembled Cu(II)-carboxylate metal-organic framework
Ma, Ruixuan,Qin, Jianhua,Shi, Lei,Zhang, Xinhai
, p. 795 - 799 (2021/07/06)
A new copper(II) metal-organic framework is constructed as a sustainable copper heterogeneous catalyst. Cu-DPTCA, with high catalytic activity, can effectively promote the Chan–Lam coupling reaction of arylboronic acids and amines without adding any base or additive.
Structure-Activity Relationship Studies of Pyrimidine-4-Carboxamides as Inhibitors of N-Acylphosphatidylethanolamine Phospholipase D
Mock, Elliot D.,Kotsogianni, Ioli,Driever, Wouter P. F.,Fonseca, Carmen S.,Vooijs, Jelle M.,Den Dulk, Hans,Van Boeckel, Constant A. A.,Van Der Stelt, Mario
, p. 481 - 515 (2021/02/05)
N-Acylphosphatidylethanolamine phospholipase D (NAPE-PLD) is regarded as the main enzyme responsible for the biosynthesis of N-acylethanolamines (NAEs), a family of bioactive lipid mediators. Previously, we reported N-(cyclopropylmethyl)-6-((S)-3-hydroxypyrrolidin-1-yl)-2-((S)-3-phenylpiperidin-1-yl)pyrimidine-4-carboxamide (1, LEI-401) as the first potent and selective NAPE-PLD inhibitor that decreased NAEs in the brains of freely moving mice and modulated emotional behavior [ Mock et al. Nat Chem. Biol., 2020, 16, 667-675 ]. Here, we describe the structure-activity relationship (SAR) of a library of pyrimidine-4-carboxamides as inhibitors of NAPE-PLD that led to the identification of LEI-401. A high-throughput screening hit was modified at three different substituents to optimize its potency and lipophilicity. Conformational restriction of an N-methylphenethylamine group by replacement with an (S)-3-phenylpiperidine increased the inhibitory potency 3-fold. Exchange of a morpholine substituent for an (S)-3-hydroxypyrrolidine reduced the lipophilicity and further increased activity by 10-fold, affording LEI-401 as a nanomolar potent inhibitor with drug-like properties. LEI-401 is a suitable pharmacological tool compound to investigate NAPE-PLD function in vitro and in vivo.
Iron-catalyzed N-alkylation of aromatic amines via borrowing hydrogen strategy
Chen, Hui,Wang, Qingfu,Liu, Tingting,Chen, Haitao,Zhou, Duo,Qu, Fengbo
, p. 877 - 884 (2021/02/16)
Earth-abundant transition metals could be used as a noble metal replacement in catalysis not only for different catalytic reactivity but environmentally benign methodology. We report here on the iron-catalyzed synthesis of N-alkylated amines via borrowing hydrogen strategy and differently functionalized aniline derivatives are alkylated in good yields.
BF3·Et2O as a metal-free catalyst for direct reductive amination of aldehydes with amines using formic acid as a reductant
Fan, Qing-Hua,Liu, Xintong,Luo, Zhenli,Pan, Yixiao,Xu, Lijin,Yang, Ji,Yao, Zhen,Zhang, Xin
supporting information, p. 5205 - 5211 (2021/07/29)
A versatile metal- and base-free direct reductive amination of aldehydes with amines using formic acid as a reductant under the catalysis of inexpensive BF3·Et2O has been developed. A wide range of primary and secondary amines and diversely substituted aldehydes are compatible with this transformation, allowing facile access to various secondary and tertiary amines in high yields with wide functional group tolerance. Moreover, the method is convenient for the late-stage functionalization of bioactive compounds and preparation of commercialized drug molecules and biologically relevant N-heterocycles. The procedure has the advantages of simple operation and workup and easy scale-up, and does not require dry conditions, an inert atmosphere or a water scavenger. Mechanistic studies reveal the involvement of imine activation by BF3and hydride transfer from formic acid.
