Palladium nanoparticles embedded in metal–organic framework derived porous carbon: synthesis and application for efficient Suzuki–Miyaura coupling reactions
作者:Wenhuan Dong、Li Zhang、Chenhuan Wang、Cheng Feng、Ningzhao Shang、Shutao Gao、Chun Wang
DOI:10.1039/c6ra00378h
日期:——
A nanoporous carbon (NPC) material was prepared by one-step direct carbonization of metal organic framework, MOF-5, without additional carbon precursors. Pd nanoparticles were immobilized on MOF-5-derived NPC by an impregnation...
Aerobic ligand-free Suzuki coupling catalyzed by in situ-generated palladium nanoparticles in water
作者:Debasree Saha、Kalicharan Chattopadhyay、Brindaban C. Ranu
DOI:10.1016/j.tetlet.2008.12.063
日期:2009.3
efficient procedure for Suzukicoupling of aryl bromides/iodides with aryl- and alkylboronicacids catalyzed by in situ-generated palladium(0) nanoparticles in water without any ligand in open air to produce a variety of functionalized biaryls and alkyl-aryls has been developed. The boronic acids act here as the reducing agent for the formation of Pd nanoparticles. The reactions are remarkably fast (5 min)
A trisphenol compound is expressed by formula (1), wherein R represents an alkyl group or alkoxyl group with 1 to 8 carbon atoms, phenyl group or hydroxyl group; R
1
represents an alkyl group or alkoxyl group with 1 to 8 carbon atoms, or phenyl group; R
2
represents an alkyl group or alkoxyl group with 1 to 8 carbon atoms; R
3
represents a hydrogen atom or alkyl group with 1 to 8 carbon atoms; a represents 0, 1, 2, or 3; b represents 1 or 2; and c and d represent 0, 1, 2, 3, or 4; where the sum of b and c is 5 or less; R's may be either the same or different when a is 2 or more; R
1
's may be either the same or different when c is 2 or more; and R
2
's may be either the same or different when d is 2 or more.
[EN] SUBSTITUTED PARA-BIPHENYLOXYMETHYL DIHYDRO OXAZOLOPYRIMIDINONES, PREPARATION AND USE THEREOF<br/>[FR] PARA-BIPHÉNYLOXYMÉTHYL-DIHYDRO-OXAZOLOPYRIMIDINONES SUBSTITUÉES, LEUR PRÉPARATION ET LEUR UTILISATION
申请人:SANOFI AVENTIS
公开号:WO2011034828A1
公开(公告)日:2011-03-24
The present invention relates to a series of substituted para-biphenyloxymethyl dihydro oxazolopyrimidinones of formula (I) as defined herein. This invention also relates to methods of making these compounds including novel intermediates. The compounds of this invention are modulators of metabotropic glutamate receptors (mGluR), particularly, mGluR2 receptor. Therefore, the compounds of this invention are useful as pharmaceutical agents, especially in the treatment and/or prevention of a variety of central nervous system disorders (CNS), including but not limited to acute and chronic neurodegenerative conditions, psychoses, cognition deficit disorders, convulsions, anxiety, depression, migraine, pain, sleep disorders and emesis.
The iron(III) chloride‐catalyzed Friedel–Crafts arylation of 4‐aryl‐4‐methoxy‐2,5‐cyclohexadienones, which were easily prepared by the phenyliodine(III) diacetate (PIDA)‐mediated oxidation of 4‐arylphenols in methanol, proceeded site‐selectively to form meta‐terphenyl (2,4‐diarylphenol) derivatives in good yields. The subsequent PIDA‐mediated oxidation and iron(III) chloride‐catalyzed Friedel–Crafts