Induced halogenation of alkyl cyclohexenyl ketones involving metal halides, hydrohalogenic acids, and hydrogen peroxide
摘要:
The induced halogenation and hydroxyhalogenation of alkyl cyclohexenyl ketones in a system [MHlg + HHlg or HHlg]-H(2)O(2) or in NaOCl was performed and optimum reaction conditions were established. Under mild conditions the electrophilic addition of the halogen or the acid occurred at the multiple bond of the ring with the formation of the corresponding dihalo or hydroxyhalo derivatives of cycloaliphatic ketones. From the compounds obtained epoxy- and dioxyketones of aliphatic series were prepared. Chloro(bromo)hydrins of ketones from the alkylcyclohexane series and oxiranes based thereon are reactive compounds and can be employed as synthons in the organic synthesis.
The present invention provides compounds, pharmaceutically acceptable compositions thereof, and methods of using the same.
本发明提供了化合物、药学上可接受的组合物以及使用它们的方法。
Metal-Free, Mild, Nonepimerizing, Chemo- and Enantio- or Diastereoselective N-Alkylation of Amines by Alcohols via Oxidation/Imine–Iminium Formation/Reductive Amination: A Pragmatic Synthesis of Octahydropyrazinopyridoindoles and Higher Ring Analogues
作者:Imran A. Khan、Anil K. Saxena
DOI:10.1021/jo4012249
日期:2013.12.6
A mild step and atom-economical nonepimerizing chemo- and enantioselective N-alkylating procedure has been developed via oxidation/imine–iminium formation/reduction cascade using TEMPO–BAIB–HEH–Brønsted acid catalysis in DMPU as solvent and a stoichiometric amount of amine. The optimized conditions were further extended for the nonenzymatic kinetic resolution of the chiral amine thus formed under nonenzymatic
4-CH<sub>3</sub>CONH-TEMPO/Peracetic Acid System for a Shortened Electron-Transfer-Cycle-Controlled Oxidation of Secondary Alcohols
作者:Shufang Zhang、Chengxia Miao、Chungu Xia、Wei Sun
DOI:10.1002/cctc.201500214
日期:2015.6.15
catalyzed oxidation of secondaryalcohols with peracetic acid as the oxidant, which was generated from H2O2 and acetic acid catalyzed by strongly acidic resins. The oxidation of alcohols proceeded well through a shortened electron‐transfer cycle under metal‐free conditions, avoiding the use of any other electron‐transfer mediators such as halides. In addition, we demonstrated that the present system exhibited
我们已经开发了一种2,2,6,6-四甲基哌啶-1-氧基(TEMPO)衍生物以过氧乙酸为氧化剂催化仲醇氧化的方法,该过氧化氢是由H 2 O 2和强酸性树脂催化的乙酸产生的。在无金属条件下,醇的氧化通过缩短的电子转移周期进行得很好,避免了使用任何其他电子转移介体,例如卤化物。另外,我们证明了本系统在温和条件下对芳族,脂族和烯丙基仲醇的氧化表现出优异的效率。
PI3 KINASE INHIBITORS AND USES THEREOF
申请人:NIU DEQIANG
公开号:US20110230476A1
公开(公告)日:2011-09-22
The present invention provides compounds, compositions thereof, and methods of using the same.
本发明提供了化合物、其组合物以及使用相同的方法。
Synthesis of Cp−Re Complexes via Olefinic C−H Activation and Successive Formation of Cyclopentadienes
Treatment of an alpha,beta-unsaturated ketimine with an alpha,beta-unsaturated carbonyl compound in the presence of a rhenium complex, Re2(CO)10, gave a cyclopentadienyl-rhenium complex. This reaction proceeds via rhenium-catalyzed C-H bond activation of an olefinic C-H bond, insertion of an alpha,beta-unsaturated carbonyl compound into a Re-C bond of the alkenylrhenium intermediate, intramolecular