1738-20-1Relevant academic research and scientific papers
METHODS AND MATERIALS FOR INCREASING OR MAINTAINING NICOTINAMIDE MONONUCLEOTIDE ADENYLYL TRANSFERASE-2 (NMNAT2) POLYPEPTIDE LEVELS
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, (2020/09/08)
This document provides methods and materials for increasing or maintaining NMNAT2 polypeptide levels within cells. For example, compounds (e.g., organic compounds) having the ability to increase or maintain NMNAT2 polypeptide levels within cells, formulations containing compounds having the ability to increase or maintain NMNAT2 polypeptide levels within cells, methods for making compounds having the ability to increase or maintain NMNAT2 polypeptide levels within cells, methods for making formulations containing compounds having the ability to increase or maintain NMNAT2 polypeptide levels within cells, methods for increasing or maintain NMNAT2 polypeptide levels within cells, and methods for treating mammals (e.g., humans) having a condition responsive to an increase in NMNAT2 polypeptide levels are provided (or for preventing said condition).
Atomic Pt-Catalyzed Heterogeneous Anti-Markovnikov C-N Formation: Pt10Activating N-H for Pt1δ+-Activated C-C Attack
Ma, Xiaodan,An, Zhe,Song, Hongyan,Shu, Xin,Xiang, Xu,He, Jing
, p. 9017 - 9027 (2020/12/23)
C-N formation is of great significance to synthetic chemistry, as N-containing products are widely used in chemistry, medicine, and biology. Addition of an amine to an unsaturated carbon-carbon bond is a simple yet effective route to produce new C-N bonds. But how to effectively conduct an anti-Markovnikov addition with high selectivity has been a great challenge. Here, we proposed a strategy for highly regioselective C-N addition via hydroamination by using supported Pt. It has been identified that atomic-scale Pt is the active site for C-N addition with Pt12+ for Markovnikov C-N formation and atomic Pt (Pt1δ+ and Pt10) contributing to anti-Markovnikov C-N formation. A selectivity of up to 92% to the anti-Markovnikov product has been achieved with atomic Pt in the addition of styrene and pyrrolidine. A cooperating catalysis for the anti-Markovnikov C-N formation between Pt1δ+ and Pt10 has been revealed. The reaction mechanism has been studied by EPR spectra and in situ FT-IR spectra of adsorption/desorption of styrene and/or pyrrolidine. It has been demonstrated that Pt10 activates amine to be electrophilic, while Pt1δ+ activates C-C by π-bonding to make β-C nucleophilic. The attack of nucleophilic β-C to electrophilic amine affords the anti-Markovnikov addition. This strategy proves highly effective to a variety of substrates in anti-Markovnikov C-N formation, including aromatic/aliphatic amines reacting with aromatic olefins, aromatic/aliphatic olefins with aromatic amines, and linear aliphatic olefins with secondary aliphatic amines. It is believed that the results provide evidence for the function of varied chemical states in monatomic catalysis.
Iron-Catalyzed Regioselective α-C-H Alkylation of N-Methylanilines: Cross-Dehydrogenative Coupling between Unactivated C(sp3)-H and C(sp3)-H Bonds via a Radical Process
Li, Ze-Lin,Sun, Kang-Kang,Wu, Peng-Yu,Cai, Chun
, p. 6830 - 6839 (2019/06/14)
The iron-catalyzed α-C-H alkylation of N-methylanilines without any directing group by cross-dehydrogenative coupling between unactivated C(sp3)-H and C(sp3)-H bonds has been established for the first time, which provides a good complement to C(sp3)-H activation reactions and expands the field of Fe-catalyzed C-H functionalizations. Many different C(sp3)-H bonds in cyclic alkanes, cyclic ethers, and toluene derivatives can be used as coupling partners. Mechanistic investigations including the radical reaction process, the main role of various reagents, and the kinetic isotope effect experiment were also described.
Formal anti-Markovnikov hydroamination of terminal olefins
Bronner, Sarah M.,Grubbs, Robert H.
, p. 101 - 106 (2014/01/06)
A new strategy to access linear amines from terminal olefin precursors is reported. This two-step, one-pot hydroamination methodology employs sequential oxidation and reduction catalytic cycles. The formal hydroamination transformation proceeds with excellent regioselectivity, and only the anti-Markovnikov product is observed. Up to 70% yield can be obtained from styrenes or aliphatic olefins and either primary or secondary aromatic amines. Additionally, the scope is broad with respect to the olefin and accommodates a variety of functionalities; we demonstrate that amines with removable aryl protecting groups may be utilized to allow access to a more diverse array of hydroamination adducts.
Amination of aromatic olefins with anilines: A new domino synthesis of quinolines
Beller, Matthias,Thiel, Oliver R.,Trauthwein, Harald,Hartung, Christian G.
, p. 2513 - 2522 (2007/10/03)
A new catalytic amination of aromatic olefins with anilines is presented. In a domino reaction, substituted quinoline derivatives are obtained in the presence of cationic rhodium complexes, such as [Rh(cod)2]BF4, and PPh3. Ethylbenzene is formed as a by-product in this new oxidative reaction. The first transition metal catalyzed anti-Markovnikov hydroamination of styrene with anilines occurs as a side reaction. Mechanistic investigations strongly support the regioselective oxidative amination of styrene as the key reaction step.
Kinetics and Mechanism of Reactions between 2-Phenylethyl Benzenesulphonates and Anilines in Methanol
Lee, Ikchoon,Choi, Yong Hoon,Lee, Hai Whang,Lee, Byung Choon
, p. 1537 - 1540 (2007/10/02)
Kinetics of reactions between 2-phenylethyl benzenesulphonates and anilines in methanol at 65.0 deg C have been studied; the mechanism is discussed on the basis of cross interaction constants, ρij.The overall reaction was found to proceed by a dissociative SN2 mechanism with a relatively small degree of aryl participation.The fraction of the phenonium ion intermediate captured by the nucleophile, aniline, in the aryl-assisted pathway has been shown to increase with a stronger nucleophile, and a four-centre transition state in an intermolecular SNi mechanism is suggested for the aryl-unassisted pathway.
