Aldehyde-enamines from α-oxocarboxylic acids. A facile and general route to aldehydes via decarboxylation of α-oxocarboxylic acids carrying β-hydrogens
Mechanistic Studies on the Catalytic Oxidative Amination of Alkenes by Rhodium(I) Complexes with Hemilabile Phosphines
作者:M. Victoria Jiménez、M. Isabel Bartolomé、Jesús J. Pérez-Torrente、Daniel Gómez、F. Javier Modrego、Luis A. Oro
DOI:10.1002/cctc.201200510
日期:2013.1
Cationic rhodium(I) complexes with P,O‐functionalised arylphosphine ligands are efficient catalysts for the regioselective anti‐Markovnikov oxidative amination of styrene with piperidine. The mechanism of the catalytic reaction has been investigated by spectroscopic means under stoichiometric and catalytic conditions. In the presence of piperidine, the catalyst precursor [Rhκ2‐P,O‐Ph2P(CH2)3OEt}2]+
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-catalyzed tandem protonation/deuteration and reduction of <i>in situ</i>-formed enamines
作者:Rongpei Wu、Ke Gao
DOI:10.1039/d1ob00316j
日期:——
protonation/deuteration and reduction of in situ-formed enamines in the presence of water and pinacolborane was developed. Regioselective β-deuteration of tertiary amines was achieved with high chemo- and regioselectivity. D2O was used as a readily available and cheap source of deuterium. Mechanisticstudies indicated that B(C6F5)3 could activate water to promote the protonation and reduction of enamines.
开发了一种高效的B(C 6 F 5)3催化串联质子化/氘代和在水和频哪醇硼烷存在下还原原位形成的烯胺的方法。叔胺的区域选择性β-氘化具有高的化学和区域选择性。D 2 O被用作一种容易获得且廉价的氘源。机理研究表明,B(C 6 F 5)3可以活化水以促进烯胺的质子化和还原。
Cyclic Seleninate Esters as Catalysts for the Oxidation of Sulfides to Sulfoxides, Epoxidation of Alkenes, and Conversion of Enamines to α-Hydroxyketones
作者:Eric A. Mercier、Chris D. Smith、Masood Parvez、Thomas G. Back
DOI:10.1021/jo300313v
日期:2012.4.6
sulfides to sulfoxides, alkenes to epoxides, and enamines to α-hydroxyketones. Optimal conditions were found that minimize the overoxidation of the product sulfoxides to sulfones and the hydrolysis of epoxides to diols. In some examples such as styrene derivatives, oxidative cleavage was observed instead of epoxidation. The enamine oxidations proceed via the initial formation of dimeric 2,5-diamino-1
[EN] ANTI-VIRAL COMPOUNDS, PHARMACEUTICAL COMPOSITIONS, AND METHODS OF USE THEREOF<br/>[FR] COMPOSÉS ANTI-VIRAUX, COMPOSITIONS PHARMACEUTIQUES ET MÉTHODES D'UTILISATION DE CES DERNIERS
申请人:KINETA INC
公开号:WO2016073947A1
公开(公告)日:2016-05-12
Disclosed herein are compounds and pharmaceutical compositions, and uses thereof for the treatment of viral infections, including RNA viral infections. The compounds, pharmaceutical compositions, and methods disclosed herein can relate to chromenone drug candidate compounds that modulate innate immunity along the RLR-IRF3 axis. These compounds activate innate immune signaling downstream of numerous viral countermeasures and are a unique addition to conventional antiviral compounds in development or on the market. These compounds possess broad spectrum in vitro activity against diverse RNA viruses including the respiratory pathogens influenza, RSV, and hCoV, with EC50 values in the low nanomolar range. Potent in vitro activity is also demonstrated against systemic and emerging viruses including Dengue and Ebola.
Catalytic reduction of organic carbonyls using metal catalysts
申请人:Massachusetts Institute of Technology
公开号:US05220020A1
公开(公告)日:1993-06-15
A process is provided whereby organic carbonyl substrates, including esters, lactones, ketones, amides and imides are reduced in a reaction with a silane reducing reagent and a catalyst. Exemplary catalysts include metal alkoxides and metal aryloxides.