First Structure−Activity Relationship Study on Dopamine D3 Receptor Agents with N-[4-(4-Arylpiperazin-1-yl)butyl]arylcarboxamide Structure
摘要:
Structure-affinity relationships of N-[4-(4-arylpiperazin-1-yl)butyl]arylcarboxamides as D-3 receptor ligands have been well characterized but not structure-activity relationships. In a first attempt to clarify this issue, seven 1-(2,3dichlorophenyl)piperazine derivatives and their 2-methoxyphenyl counterparts were prepared by varying the arylcarbox-amide moiety. They were tested for D3 receptor binding affinities and in the Eu-GTP binding assay in order to evaluate their intrinsic activity. We have found that the intrinsic activity strongly depended on the nature of the arylearboxamide moiety.
Cobalt-catalyzed carboxylation of aryl and vinyl chlorides with CO<sub>2</sub>
作者:Yanwei Wang、Xiaomei Jiang、Baiquan Wang
DOI:10.1039/d0cc06451c
日期:——
The transition-metal-catalyzed carboxylation of aryl and vinylchlorides with CO2 is rarely studied, and has been achieved only with a Ni catalyst or combination of palladium and photoredox. In this work, the cobalt-catalyzed carboxylation of aryl and vinylchlorides and bromides with CO2 has been developed. These transformations proceed under mild conditions and exhibit a broad substrate scope, affording
A visible-light-driven carboxylation of aryl and alkenyl triflates with CO2 is developed by using a combination of Pd and photoredox catalysts. This reaction proceeds under mild conditions and can be applied to a wide range of substrates including acyclic alkenyl triflates.
cobalt-catalyzed reductive carboxylation reaction of alkenyl trifluoromethanesulfonates (triflates) has been developed. By employing Mn powder as a reducing reagent under 1 atm pressure of CO2 at room temperature, diverse alkenyl triflates can be converted to the corresponding α,β-unsaturated carboxylic acids. Moreover, the carboxylation of stericallyhindered aryl triflates proceeds smoothly in the presence of
Activation of Aryl and Vinyl Triflates by Palladium and Electron Transfer – Electrosynthesis of Aromatic and α,β-Unsaturated Carboxylic Acids from Carbon Dioxide
The electrochemical reduction of aryl and vinyltriflates in the presence of CO2 and a catalytic amount of palladium results in the formation of aromatic and α,β-unsaturated carboxylic acids. Aryl and vinyltriflates usually undergo palladium-catalysed cross-coupling reactions with nucleophiles. Their reactivity has been reversed in the presence of an electron source, so that they react with electrophiles
在 CO2 和催化量的钯存在下,芳基和乙烯基三氟甲磺酸酯的电化学还原导致芳族和 α,β-不饱和羧酸的形成。芳基和乙烯基三氟甲磺酸酯通常与亲核试剂发生钯催化的交叉偶联反应。在存在电子源的情况下,它们的反应性会发生逆转,因此它们会与亲电子试剂(如 )发生反应。该反应通过芳基或乙烯基三氟甲磺酸酯的 C-O 键通过氧化加成到钯 (0) 络合物进行活化,然后通过电子转移由此形成的芳基或乙烯基钯 (II) 络合物进行活化。
Carboxylation of Alkenyl Boronic Acids and Alkenyl Boronic Acid Pinacol Esters with CO<sub>2</sub>
Catalyzed by Cuprous Halide
作者:Junting Hong、Onkar S. Nayal、Fanyang Mo
DOI:10.1002/ejoc.202000288
日期:2020.5.22
Three kinds of alkenylboron compounds were effectively transformed into the corresponding α, β‐unsaturated carboxylic acids in moderate to high yields through a cuprous halide catalyzed carboxylation with CO2. The advantages of this method include low cost, mild conditions, simple operation, broad scope, and external ligand free.