Ketones are a fundamental functionality found throughout a range of natural and synthetic compounds, making their synthesis essential throughout the chemical disciplines. Herein, we describe a one-pot synthesis of ketones via decatungstate-mediated formal dehydrogenative coupling between aldehydes and non-activated hydrocarbons. A variety of substituted benzaldehydes and cycloalkanes could be used
Imidazole derivatives as histamine receptor H3 (ANT) agonists
申请人:Institut National de la Sante et de la Recherche Medical
公开号:US06248765B1
公开(公告)日:2001-06-19
Novel imidazole derivatives as histamine receptor H3 antagonists and/or agonists, preparation thereof and therapeutical uses thereof. Chemical compounds for use as histamine receptor H3 agonists, partial agonists or antagonists, having general formula (Ia) or (Ib), the use thereof for making drugs, and methods for revealing the agonist, partial agonist or antagonist activity of such compounds in vivo, are disclosed.
Quinoline and quinazoline derivatives inhibiting platelet-derived growth
申请人:Kirin Beer Kabushiki Kaisha
公开号:US06143764A1
公开(公告)日:2000-11-07
The present invention relates to novel quinoline derivatives and quinazoline derivatives represented by the following formula (I): ##STR1## [wherein R.sub.1 and R.sub.2 are each independently H or C.sub.1 -C.sub.4 -alkyl, or R.sub.1 and R.sub.2 together form C.sub.1 -C.sub.3 -alkylene, X is O, S or CH.sub.2, W is CH or N, and Q is a substituted aryl group or substituted heteroaryl group] and their pharmaceutically acceptable salts, having platelet-derived growth factor receptor autophosphorylation inhibitory activity, to pharmaceutical compositions containing these compounds, and to methods for the treatment of diseases associated with abnormal cell growth such as tumors.
An Improved Synthesis of Hydroxy Aryl Ketones by Fries Rearrangement with Methanesulfonic Acid/Methanesulfonic Anhydride
作者:Ingyu Jeon、Ian Mangion
DOI:10.1055/s-0032-1316568
日期:2012.8
Methanesulfonic acid treated with methanesulfonic anhydride effectively mediates the Fries rearrangement of aryl esters to give hydroxy aryl ketones with high yields.
Visible Light Copper Photoredox-Catalyzed Aerobic Oxidative Coupling of Phenols and Terminal Alkynes: Regioselective Synthesis of Functionalized Ketones via C≡C Triple Bond Cleavage
Direct oxidative coupling of phenols and terminal alkynes was achieved at room temperature by a visible-light-mediated copper-catalyzed photoredox process. This method allows regioselective synthesis of hydroxyl-functionalized aryl and alkyl ketones from simple phenols and phenylacetylene via C≡C triple bond cleavage. 47 examples were presented. From a synthetic perspective, this protocol offers an