Migration of electronegative substituents. I. Relative migratory aptitude and migration tendency of the carbethoxy group in the dienone-phenol rearrangement
Copper/Selectfluor-System-Catalyzed Dehydration-Oxidation of Tertiary Cycloalcohols: Access to β-Substituted Cyclohex-2-enones, 4-Arylcoumarins, and Biaryls
作者:Shaobo Ren、Jian Zhang、Jiahui Zhang、Heng Wang、Wei Zhang、Yunkui Liu、Miaochang Liu
DOI:10.1002/ejoc.201500610
日期:2015.8
A route to β-substitutedcyclohex-2-enones, 4-arylcoumarins, and biaryls has been developed. This approach involves a one-pot Cu0/Selectfluor-catalyzed dehydration–oxidation of tertiary cycloalcohols. Thus, by using 2 equiv. of Selectfluor at 25 °C, the dehydration–oxidation of tertiary cyclohexanols and oxabenzocyclohexanols gave β-substitutedcyclohex-2-enones and 4-arylcoumarins, respectively; whereas
[EN] OREXIN RECEPTOR ANTAGONISTS WHICH ARE [ORTHO BI (HETERO )ARYL]-[2-(META BI (HETERO )ARYL)-PYRROLIDIN-1-YL]-METHANONE DERIVATIVES<br/>[FR] ANTAGONISTES DES RÉCEPTEURS DE L'OREXINE, QUI SONT DES DÉRIVÉS [ORTHO BI (HETERO )ARYL]-[2-(META BI (HETERO )ARYL)-PYRROLIDIN-1-YL]-METHANONE
申请人:ACTELION PHARMACEUTICALS LTD
公开号:WO2014057435A1
公开(公告)日:2014-04-17
The present invention relates to [ortho bi-(hetero-)aryl]-[2-(meta bi-(hetero-)aryl)-pyrrolidin-1-yl]- methanone derivatives of formula (I) wherein R, and the rings A1 A2 and A3 are as described in the description, to pharmaceutically acceptable salts thereof, to their preparation, to pharmaceutical compositions containing one or more compounds of formula (I), and to their use as pharmaceuticals, especially to their use as orexin receptor antagonists.
An Aerobic Ligandless Palladium Acetate Catalysed Suzuki-Miyaura Cross-Coupling Reaction in an Aqueous Solvent
作者:Chen Li、Xiao-Qiang Li、Chi Zhang
DOI:10.3184/030823408x349952
日期:2008.9
Suzuki–Miyaura reaction of aryl iodides and aryl bromides was catalysed by Pd(OAc)2 (1 mol%) using K3PO4·3H2O (2 equiv) as base in dimethyl acetamide DMA-H2O (1 : 1) at room temperature. Changes in the loading of Pd(OAc)2 (from 1 mol% to 2 mol%), temperature (from room temperature to 80 °C) and the ratio of DMA to water (from 1 : 1 to 5 : 1) resulted in the successful coupling of activatedarylchlorides with
Arylindium and isolated triarylbismuth compounds generated in situ react as nucleophiles with arenediazoniumsalts in palladium-catalyzed cross-coupling reactions to give substituted biphenyls.
The present invention relates to thiazolylpiperidine derivatives of the general formula (I):
in which:
A represents a radical chosen from the radicals a1 and a2 below:
G represents a bond or a divalent radical chosen from the groups g1, g2 and g3 below:
and R
1
, R
2
, R
2′
, R
3
, R
4
, R
5
, Y and Z are as defined in the description. Application of the compounds of the formula (I) to the treatment of hypertriglyceridaemia, hypercholesterolaemia and dyslipidaemia.