52772-41-5

Upstream product

• 104-53-0 3-phenyl-propionaldehyde 
• 37904-38-4 5-phenylpent-1-en-3-ol 
• 98-80-6 phenylboronic acid 
• 163976-61-2 ethyl 5-phenylpent-1-en-3-yl carbonate 
• 103240-88-6 5-phenylpenten-3-yl acetate 
• 29443-54-7 1,1-diiodo-2-phenylethane 
• 120982-92-5 1-methyl-4-(3-phenylpropylsulfinyl)benzene 
• 75553-23-0 (E)-5-phenyl-2-penten-1-ol 
• 542-75-6 E/Z-1,3-Dichloropropene 
• 17486-86-1 1,5-diphenylpentan-3-ol 
• 383-35-7 ethyldifluorophenylsilane 

Relevant academic research and scientific papers

GPR52 Antagonist Reduces Huntingtin Levels and Ameliorates Huntington's Disease-Related Phenotypes

GPR52 is an orphan G protein-coupled receptor (GPCR) that has been recently implicated as a potential drug target of Huntington's disease (HD), an incurable monogenic neurodegenerative disorder. In this research, we found that striatal knockdown of GPR52 reduces mHTT levels in adult HdhQ140 mice, validating GPR52 as an HD target. In addition, we discovered a highly potent and specific GPR52 antagonist Comp-43 with an IC50 value of 0.63 μM by a structure-activity relationship (SAR) study. Further studies showed that Comp-43 reduces mHTT levels by targeting GPR52 and promotes survival of mouse primary striatal neurons. Moreover, in vivo study showed that Comp-43 not only reduces mHTT levels but also rescues HD-related phenotypes in HdhQ140 mice. Taken together, our study confirms that inhibition of GPR52 is a promising strategy for HD therapy, and the GPR52 antagonist Comp-43 might serve as a lead compound for further investigation.

Nickel-Catalyzed Direct Coupling of Allylic Alcohols with Organoboron Reagents

The direct coupling of allylic alcohols with arylboronic acids or their derivatives catalyzed by Ni(cod)2 in the presence of a catalytic amount of base has been developed. A wide variety of allylic substrates or arylboronic acids turned out to be applicable to this catalytic system. The present method does not require the use of ligands for stabilizing the nickel catalyst in most cases or additional activators for activation of allylic alcohols.

Stereospecific allyl-aryl coupling catalyzed by in situ generated palladium nanoparticles in water under ambient conditions

A practical process for the stereospecific cross-coupling of secondary allylic carbonates with arylboronic acids has been developed. The reaction is catalyzed by in situ generated palladium nanoparticles (PdNPs) without any ligands and additional stabilizers in water under ambient conditions and furnishes the allyl-aryl coupling products in high isolated yields with high stereospecificities as well as excellent chemo-, regio- and E/Z-selectivities. The in situ generated PdNPs showed extraordinary catalytic activity (S/C up to 5000) even for the allyl-aryl coupling reactions of easily eliminated allylic carbonates under aqueous ambient conditions. The mechanism of the process has also been investigated.

Palladium-catalyzed γ-selective and stereospecific allyl-aryl coupling between acyclic allylic esters and arylboronic acids

Reactions between acyclic (E)-allylic acetates and arylboronic acids in the presence of a palladium catalyst prepared from Pd(OAc)2, phenanthroline (or bipyridine), and AgSbF6 (1:1.2:1) proceeded with excellent γ-selectivity to afford allyl-aryl coupling products with E-configuration. The reactions of α-chiral allylic acetates took place with excellent α-to-γ chirality transfer with syn stereochemistry to give allylated arenes with a stereogenic center at the benzylic position. The reaction tolerated a broad range of functional groups in both the allylic acetates and the arylboronic acids. Furthermore, γ-arylation of cinnamyl alcohol derivatives afforded gem-diarylalkane derivatives containing an unconjugated alkenic substituent. The synthetic utility of this method was demonstrated by its utilization in an efficient synthesis of (+)-sertraline, an antidepressant agent. The observed γ-regioselectivity and E-1,3-syn stereochemistry were rationalized based on a Pd(II) mechanism involving transmetalation between a cationic mono(acyloxo)palladium(II) complex and arylboronic acid, and directed carbopalladation followed by syn-β-acyloxy elimination. The results of stoichiometric reactions of palladium complexes related to possible intermediates were fully consistent with the proposed mechanism.

Zinc homologation-elimination reaction of α-sulfinyl carbanions as a new route to olefins

α-Lithiosulfinyl carbanions react either intermolecularly, after transmetalation into an organocopper derivative in an SN2-type process, with zinc carbenoids, or intramolecularly by higher-order zincates through a tandem zinc homologation-β-elimination reaction into the corresponding alkenes. α,α- and α,β-Disubstituted alkenes can also be produced through these two methodologies. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.

Cross-coupling reactions of allylic alcohols in water

Palladium-catalyzed cross-coupling reactions of allylic alcohols and arylboronic acids in water are described. The reactions proceeded smoothly in water at reflux using catalytic amounts of [Pd(allyl)Cl]2 and PPh3. Addition of a catalytic amount of a base allowed the reaction to proceed even at lower temperatures.

A synthesis of enantiomerically enriched propargyl silanes

Reduction of ethyl 3-methyl-, 3-isopropyl- and 3-n-pentyl-3-[dimethyl(phenyl)silyl]propanoates 4 with DIBAL to the aldehydes 5, enol trifluoromethanesulfonate (triflate) formation using trifluoromethanesulfonic (triflic) anhydride and 2,6-di-tert-butylpyridine, and elimination using LDA, gives the propargyl silanes 8. The esters 4 could also be prepared enantiomerically enriched (11), and the final products are the enantiomerically enriched propargyl (homochiral) silanes 14.

The Palladium-Catalyzed Cross-Coupling Reaction of Organosilicon Compounds with Allylic Carbonates or Diene Monoxides

The cross-coupling reaction of allylic carbonates with organosilanes was found to proceed without fluoride ion activation under mild conditions by using a coordinatively unsaturated palladium complex as a catalyst.The reaction was assumed to proceed through an allylpalladium alkoxide derived from the allylic carbonate substrate and a palladium(0) species, the alkoxo ligand activating the organosilicon reagent.Likewise, diene monoxides also underwent cross-coupling with alkenyl- and arylfluorosilanes in moderate to high yields.

SN2'Substitutions of 1,3-Dichloropropenes with the Functionalized Copper-Zinc Reagents RCu(CN)ZnX

The addition of benzenesulfenyl (or benzeneselenyl) chlorides to propargylic chlorides affords regio- and stereospecifically (E)-1,3-dichloro-2-phenylsulfenyl (or phenylselenyl) propenes (2a-c).These new reagents were found to react with excellent SN2'selectivity with the highly functionalized copper-zinc reagents RCu(CN)ZnX, affording polyfunctional vinylic-thioethers or -selenides of type 3.The acidic hydrolysis of 3 furnishes symmetrical ketones in good yields.