Oxidative Cleavage of Methyl Ethers Using the HOF.cntdot.CH3CN Complex
摘要:
HOF . CH3CN complex, made easily by bubbling fluorine diluted with nitrogen through aqueous acetonitrile, proved to be a suitable oxidizer for various methyl ethers. Secondary ethers are oxidized to ketones and even to lactones via Baeyer-Villiger type of oxidation. The reaction is ionic, and the reagent's electrophilic oxygen attacks the relatively electron rich C-H bend alpha to the ether moiety. It was found that the more sterically hindered is the C-H bond in question, the slower the reaction. In cases where this bond is an electron poor one as in benzoin methyl ether (9), no reaction takes place. When labeled (HOF)-O-18 . CH3CN is used on a O-16 methyl ether, the resulting ketone possesses only the heavier oxygen isotope. Primary methyl ethers are somewhat slower to react, but they too were oxidized in very good yields to acids via the corresponding aldehydes.
[EN] SPIROALKENE CARBOXAMIDE DERIVATIVES AND THEIR USE AS CHEMOKINE RECEPTOR MODULATORS<br/>[FR] DÉRIVÉS DE SPIROALCÈNECARBOXAMIDE ET LEUR UTILISATION COMME MODULATEURS DE RÉCEPTEURS DE CHEMOKINES
申请人:ARES TRADING SA
公开号:WO2012130915A1
公开(公告)日:2012-10-04
The present invention is directed to compounds of Formula (I) below, which are antagonists to the chemoattractant cytokine receptor 2 (CCR2), and/or 5 (CCR5), pharmaceutical compositions, and methods for use thereof.
A colloidal system based on an aqueous suspension of rhodium(o) nanoparticles proved to be an efficient catalyst for the hydrogenation of arene derivatives under biphasic conditions. The rhodiumnanoparticles (2-2.5 nm) were synthesized by the reduction of RhCl3 x 3H2O with sodium borohydride and were stabilized by highly water-soluble N-alkyl-N-(2-hydroxyethyl)ammonium salts (HEA-Cn). These surfactant
事实证明,基于铑(o)纳米粒子水悬浮液的胶体体系是在双相条件下氢化芳烃衍生物的有效催化剂。通过用硼氢化钠还原RhCl3 x 3H2O合成铑纳米粒子(2-2.5 nm),并通过高度水溶性的N-烷基-N-(2-羟乙基)铵盐(HEA-Cn)使其稳定。通过测量表面张力来表征这些表面活性剂分子,并通过透射电子低温显微镜观察到具有铑的水分散体。在超温和的条件下,即室温和1 atm H2压力下,该催化系统是有效的。包含受保护的铑(0)胶体的水相可以重复使用,而不会显着降低活性。
TRICYCLIC GUANIDINE DERIVATIVE
申请人:Sunovion Pharmaceuticals Inc.
公开号:US20160083400A1
公开(公告)日:2016-03-24
Disclosed are compounds useful as inhibitors of Phosphodiesterase 1 (PDE1), compositions thereof, and methods of using the same.
揭示了作为磷酸二酯酶1(PDE1)抑制剂有用的化合物,以及它们的组合物和使用方法。
Ligand effect in the Rh-NP catalysed partial hydrogenation of substituted arenes
phosphine and phosphite ligands I–IV were synthesised, characterised and applied as catalysts in the partial hydrogenation of substituted arenes. In the case of disubstituted arenes, selectivities for the corresponding cyclohexene derivatives of up to 39% were achieved at ca. 40% conversion. The effect of parameters such as temperature and pressure was also examined. In the hydrogenation of styrene, very
[EN] TETRAZOLE COMPOUNDS WHICH SELECTIVELY MODULATE THE CB2 RECEPTOR<br/>[FR] COMPOSÉS TÉTRAZOLES QUI MODULENT SÉLECTIVEMENT LE RÉCEPTEUR CB2
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2011109324A1
公开(公告)日:2011-09-09
Compounds of formula (I) are disclosed. Compounds according to the invention bind to and are agonists, antagonists or inverse agonists of the CB2 receptor, and are useful for treating inflammation. Those compounds which are agonists are additionally useful for treating pain.