Visible-light-mediated direct perfluoroalkylation and trifluoromethylation of free anilines
作者:Chun-Yang He、Ji-Wei Gu、Xingang Zhang
DOI:10.1016/j.tetlet.2017.09.010
日期:2017.10
A mild, operationally simple method for direct perfluoroalkylation and trifluoromethylation of anilines through visible-light-mediated photoredox catalysis from broadly available perfluoroalkyl iodides and free anilines is described. The method provides a facile route for application in drug discovery and development.
A subject of the invention is a preparation process for the products of formula (I): ##STR1## in which R.sub.1 and R.sub.2 represent in particular hydrogen, cyano, halogen or amino,R.sub.3 represents in particular hydrogen or hydroxyl alkyl, R.sub.4 and R.sub.5 represent in particular optionally substituted alkyl, X and y represent oxygen or sulphur, characterized in that a product of formula (A): ##STR2## is prepared in which W represents a halogen atom or a hydantoin derivative, which is subjected to various reactions in order to obtain the products of formula (I), all their isomers and their salts.
cobalt precursor can be activated for asymmetric hydrogenation catalysis by using the traditional ligands developed for the precious metals. Zuo et al. (p. 1080) focused on iron, demonstrating a highly effective asymmetric transfer hydrogenationcatalyst that uses a ligand rationally designed after careful mechanistic study. Jagadeesh et al. (p. 1073) prepared supported ironcatalysts that selectively reduce
Substrate selectivity of human aldehyde oxidase 1 in reduction of nitroaromatic drugs
作者:Takuo Ogiso、Tatsuki Fukami、Kenji Mishiro、Keigo Konishi、Jeffrey P. Jones、Miki Nakajima
DOI:10.1016/j.abb.2018.10.017
日期:2018.12
oxidation of various drugs and endogenous compounds. Recently, we found that AOX1 catalyzed the reduction of drugs such as nitrazepam and dantrolene. In this study, we aimed to clarify the substrate selectivity of human AOX1 for the reduction of nitroaromatic drugs to obtain helpful information for drug development. We investigated whether 11 nitroaromatic drugs were reduced by AOX1 using recombinant
Nitrogen-Doped Graphene-Activated Iron-Oxide-Based Nanocatalysts for Selective Transfer Hydrogenation of Nitroarenes
作者:Rajenahally V. Jagadeesh、Kishore Natte、Henrik Junge、Matthias Beller
DOI:10.1021/cs501916p
日期:2015.3.6
Nanoscaled iron oxides on carbon were modified with nitrogen-doped graphene (NGr) and found to be excellent catalysts for the chemoselective transfer hydrogenation of nitroarenes to anilines. Under standard reaction conditions, a variety of functionalized and structurally diverse anilines, which serve as key building blocks and central intermediates for fine and bulk chemicals, were synthesized in good to excellent yields.