Herein, we report a straightforward, environmentally friendly, and controllable palladium/ligand catalytic system to enable reductive/oxidative Heckreactions of cyclic enones with thiophene or furan derivatives via C-H activation. The key to this tunable reaction is the appropriate intercepting thienyl-Pd(II)-enolate during the enolization process. Such a controllable and economic protocol would not
Halogen Bond‐Catalyzed Friedel−Crafts Reactions of Furans Using a 2,2’‐Bipyridine‐Based Catalyst
作者:Huimiao Zhang、Patrick H. Toy
DOI:10.1002/adsc.202001019
日期:2021.1.5
to catalyze Friedel−Crafts reactions of furans. Electrophiles used successfully in these reactions included various enones, an aldehyde, and a carboxylic acid anhydride. The yields of the reactions were generally good using a moderate catalyst loading (0.025 or 0.1 equiv.) at a relatively low temperature (room temp. or 50 °C) in acetonitrile. The catalyst used was designed with a biaryl scaffold so
Niobium Pentachloride Activation of Enone Derivatives: Diels-Alder and Conjugate Addition Products
作者:Mauricio Constantino、Valdemar Júnior、Gil Da Silva
DOI:10.3390/70500456
日期:——
Niobium pentachloride has proven to be a powerful activating agent for Diels-Alder or conjugate addition reactions of cycloenones. The Diels-Alder product was obtained only with an unsubstituted enone (cyclohexenone) and the highly reactive diene cyclopentadiene; substituents in the β-position of enones seem to prevent Diels-Alder reaction: oxygenated substituents favor the formation of vinyl chlorides
Process for the production of CCR2 receptor antagonists and intermediates thereof
申请人:BOEHRINGER INGELHEIM INTERNATIONAL GMBH
公开号:EP2816040A1
公开(公告)日:2014-12-24
The present invention relates to a process for the production of novel antagonists for CCR2 (CC chemokine receptor 2) of formula (I) from 6-Chloro-pyrimidine-methanone intermediates.
Formula (I):
Specifically claimed 6-chloropyrimidine-methanone intermediates are: