Hydropersulfides: H-Atom Transfer Agents Par Excellence
作者:Jean-Philippe R. Chauvin、Markus Griesser、Derek A. Pratt
DOI:10.1021/jacs.7b02571
日期:2017.5.10
biotransmitter hydrogen sulfide (H2S) and disulfides (RSSR) and/or sulfenicacids (RSOH). RSSH have been investigated for their ability to store H2S in vivo and as a line of defense against oxidative stress, from which it is clear that RSSH are much more reactive to two-electron oxidants than thiols. Herein we describe the results of our investigations into the H-atom transfer chemistry of RSSH, contrasting
A nickel-catalyzed aryl thioether metathesis has been developed to access high-value thioethers. 1,2-Bis(dicyclohexylphosphino)ethane (dcype) is essential to promote this highly functional-group-tolerant reaction. Furthermore, synthetically challenging macrocycles could be obtained in good yield in an unusual example of ring-closingmetathesis that does not involve alkene bonds. In-depth organometallic
Neue Pulver-Formulierungen, die aus mindestens einem agrochemischen Wirkstoff, mindestens einem Copolymerisat aus Styrol und Acrylnitril mit einem Acrylnitrilanteil zwischen 20 und 40 Gew.-% sowie gegebenenfalls Zusatzstoffen bestehen und einen Teilchendurchmesser unterhalb von 125 µm aufweisen, ein Verfahren zur Herstellung der neuen Pulver-Formulierungen und deren Verwendung zur Applikation von agrochemischen Wirkstoffen auf Pflanzen und/oder deren Lebensraum.
[EN] PROCESSES FOR THE PREPARATION OF MORPHINANE AND MORPHINONE COMPOUNDS<br/>[FR] PROCÉDÉS POUR LA PRÉPARATION DE COMPOSÉS DE MORPHINANE ET DE MORPHINONE
申请人:UNIV BROCK
公开号:WO2010121369A1
公开(公告)日:2010-10-28
The present application describes processes for the synthesis of morphinane and morphinone compounds, useful as pharmaceutical agents. Also included are novel intermediates useful in the preparation of these compounds. The process comprises quaternization of oripavine to provide a mixture of the R- and S-isomeric (at the nitrogen) quaternary salts. The R-isomer is readily isolated and converted to various N-(R)-morphinane and N-(S)-morphinone compounds. The R-isomer, S-isomer or a mixture of R- and S-isomers may be demethylated and converted to various morphinane and morphinone compounds.
The reactions of 2,3-dichloro-1,4-naphthoquinone with some indoles and thiols were investigated. The resulting nucleophilic substitution products were characterized by spectroscopic methods (FT-IR, 1H and 13C NMR, MS) and microanalysis. The effects of polar and nonpolar solvents on the electronic absorption spectra and electrochemical properties of some newly synthesized compounds were also studied
研究了2,3-二氯-1,4-萘醌与一些吲哚和硫醇的反应。所得亲核取代产物通过光谱方法(FT-IR,1 H和13 C NMR,MS)和微量分析进行表征。还研究了极性和非极性溶剂对一些新合成化合物的电子吸收光谱和电化学性质的影响。