Practical and Selective sp
<sup>3</sup>
C−H Bond Chlorination via Aminium Radicals
作者:Alastair J. McMillan、Martyna Sieńkowska、Piero Di Lorenzo、Gemma K. Gransbury、Nicholas F. Chilton、Michela Salamone、Alessandro Ruffoni、Massimo Bietti、Daniele Leonori
DOI:10.1002/anie.202100030
日期:2021.3.22
also the fine‐tuning of physicochemical and biological properties of drugs, agrochemicals and polymers. We report here a general and practical photochemical strategy enabling the site‐selective chlorination of sp3 C−H bonds. This process exploits the ability of protonated N‐chloroamines to serve as aminium radical precursors and also radical chlorinatingagents. Upon photochemical initiation, an efficient
Triazolium Carbene Catalysts and Stereoselective Bond Forming Reactions Thereof
申请人:Rovis Tomislav
公开号:US20110224431A1
公开(公告)日:2011-09-15
Provided herein are triazolium carbine catalysts useful for asymmetric hydration, fluorination, and deuteration, and processes for their preparation. Also provided are synthetic reactions in which these catalysts are used, in particular, in stereoselective formation of carbon-chlorine, carbon-hydrogen, carbon-fluorine, and carbon-deuterium bonds.
Vanilloid receptor ligands, pharmaceutical compositions containing them, process for making them and use thereof for treating pain and other conditions
申请人:Frank Robert
公开号:US20080275044A1
公开(公告)日:2008-11-06
Compounds corresponding to formula I:
which act as vanilloid receptor ligands, pharmaceutical compositions containing such compounds, a process for the producing such compounds, and the use thereof to treat or inhibit pain and/or various other disorders or conditions.
Process for producing optically active carboxylic acid subtituted in 2-position
申请人:——
公开号:US20030144546A1
公开(公告)日:2003-07-31
A nitrous acid salt is added at a temperature of 10 to 80° C. to an aqueous solution which contains an optically active 2-aminocarboxylic acid (4) and a protonic acid, the amount of the latter acid being 1 to 3 equivalents to the former, and which has a proton concentration of 0.5 to 2 mol/kg to conduct a reaction to thereby produce an optically active 2-hydroxycarboxylic acid (1). Thionyl chloride and a basic compound are caused to act on the compound (1) to chlorinate it and simultaneously invert the configuration in the 2-position. Thus, an optically active 2-chlorocarboxylic acid chloride (5) is induced. The compound (5) is hydrolyzed to induce an optically active 2-chlorocarboxylic acid (2). The compound (2) is reacted with a thioacetic acid salt to incorporate an acetylthio group thereinto and simultaneously invert the configuration in the 2-position to thereby produce an optically active 2-acetylthiocarboxylic acid (3).
1
The invention relates to novel 1,2,3,4-tetrahydroisochinoline derivatives of formula (I) and their use as active ingredients in the preparation of pharmaceutical compositions. The invention also concerns related aspects including processes for the preparation of the compounds, pharmaceutical compositions containing one or more of those compounds and especially their use as orexin receptor antagonists.