The present invention relates to ethynyl derivatives of formula I
wherein U, V, W, Y, R, R
1
, R
2
, R
3
and R
3′
are as described herein.
It has been found that the compounds of general formula I are allosteric modulators of the metabotropic glutamate receptor subtype 5 (mGluR5).
[EN] ETHYNYL DERIVATIVES AS METABOTROPIC GLUTAMATE RECEPTOR MODULATORS<br/>[FR] DÉRIVÉS D'ÉTHYNYLE COMME MODULATEURS DU RÉCEPTEUR MÉTABOTROPIQUE AU GLUTAMATE
申请人:HOFFMANN LA ROCHE
公开号:WO2013050460A1
公开(公告)日:2013-04-11
The present invention relates to ethynyl derivatives of formula I wherein Y is N or CH; with the proviso that Y can only be CH, if at least on of U, V or W are N; U is N or C-R4; V and W are independently N or CH; with the proviso that only one of U, V or W can be simultaneously nitrogen; R4 is hydrogen, methyl or halogen; R1 is phenyl or heteroaryl, which are optionally substituted by halogen, lower alkyl or lower alkoxy; R is hydrogen or lower alkyl; R2 is hydrogen, lower alkyl, lower alkoxy, CF3 or S-lower alkyl; are independently from each other hydrogen, lower alkyl or lower alkoxy; or R3 and R3 form together a C3-5-cycloalkyl-, tetrahydrofuran- or an oxetane-ring; or to a pharmaceutically acceptable acid addition salt, to a racemic mixture, or to its corresponding enantiomer and/or optical isomer and/or stereoisomer thereof. It has been found that the compounds of general formula I are allosteric modulators of the metabotropic glutamate receptor subtype 5 (mGluR5).
Sulfonated N-Heterocyclic Carbenes for Pd-Catalyzed Sonogashira and Suzuki-Miyaura Coupling in Aqueous Solvents
作者:Sutapa Roy、Herbert Plenio
DOI:10.1002/adsc.200900886
日期:——
of the respective disulfonated N‐heterocyclic carbene (NHC) precursors in reasonable yields (46–77%). Water‐soluble palladium catalyst complexes, in situ obtained from the respective sulfonated imidazolinium salt, sodium tetrachloropalladate (Na2PdCl4) and potassium hydroxide (KOH) in water, were successfully applied in the copper‐free Sonogashiracoupling reaction in isopropyl alcohol/water mixtures
for the Sonogashira cross-coupling exploiting the safe use of a CPME/water azeotropic mixture and the utilization of a heterogeneous hybrid palladium catalyst supported onto a silica/β-cyclodextrin matrix in continuousflow. The use of the aq CPME azeotrope has proven to be crucial to enhance the catalyst performance including very low metal leaching. In addition, we have also completed the flow protocol
Efficient heterogeneous Pd/CuFe2O4 nanowires which catalyze cross coupling transformations are described. The protocol is applied to a one-pot synthesis of benzofurans via Sonogashira coupling and an intramolecular etherification sequence.