Affinity of 3-acyl substituted 4-quinolones at the benzodiazepine site of GABAA receptors
摘要:
The finding that alkyl 1,4-dihydro-4-oxoquinoline-3-carboxylate and N-alkyl-1,4-dihydro-4-oxoquinoline3-carboxamide derivatives may be high-affinity ligands at the benzodiazepine binding site of the GABA(A) receptor, prompted a study of 3-acyl-1,4-dihydro-4-oxoquinoline (3-acyl-4-quinolones). In general, the affinity of the 3-acyl derivatives was found to be comparable with the 3-carboxylate and the 3-carboxamide derivatives, and certain substituents ( e. g., benzyl) in position 6 were again shown to be important. As it is believed that the benzodiazepine binding site is situated between an alpha-and a gamma-subunit in the GABA(A) receptor, selected compounds were tested on the alpha(1)beta(2)gamma(2s), alpha(2)beta(2)gamma(2s) and alpha(3)beta(2)gamma(2s) GABAA receptor subtypes. The 3-acyl-4-quinolones display various degrees of selectivity for alpha(1)-versus alpha(2)- and alpha(3)- containing receptors, and high-affinity ligands essentially selective for alpha(1) over alpha(3) were developed. (c) 2008 Elsevier Ltd. All rights reserved.
Affinity of 3-acyl substituted 4-quinolones at the benzodiazepine site of GABAA receptors
摘要:
The finding that alkyl 1,4-dihydro-4-oxoquinoline-3-carboxylate and N-alkyl-1,4-dihydro-4-oxoquinoline3-carboxamide derivatives may be high-affinity ligands at the benzodiazepine binding site of the GABA(A) receptor, prompted a study of 3-acyl-1,4-dihydro-4-oxoquinoline (3-acyl-4-quinolones). In general, the affinity of the 3-acyl derivatives was found to be comparable with the 3-carboxylate and the 3-carboxamide derivatives, and certain substituents ( e. g., benzyl) in position 6 were again shown to be important. As it is believed that the benzodiazepine binding site is situated between an alpha-and a gamma-subunit in the GABA(A) receptor, selected compounds were tested on the alpha(1)beta(2)gamma(2s), alpha(2)beta(2)gamma(2s) and alpha(3)beta(2)gamma(2s) GABAA receptor subtypes. The 3-acyl-4-quinolones display various degrees of selectivity for alpha(1)-versus alpha(2)- and alpha(3)- containing receptors, and high-affinity ligands essentially selective for alpha(1) over alpha(3) were developed. (c) 2008 Elsevier Ltd. All rights reserved.
Direct Reduction of Allylic Alcohols Using Isopropanol as Reductant
作者:Masahiro Sai
DOI:10.1002/adsc.201800731
日期:2018.9.17
lithium cation‐catalyzed direct reduction of allylicalcohols to alkenes using isopropanol as a hydride donor was developed. The hydride transfer of the in situ‐generated lithium isopropoxide to an allylic cation is the key process in this transformation. The reaction generates only water and acetone as byproducts, which highlights the synthetic utility of this method.
FeCl<sub>3</sub>·6H<sub>2</sub>O Catalyzed Disproportionation of Allylic Alcohols and Selective Allylic Reduction of Allylic Alcohols and Their Derivatives with Benzyl Alcohol
been found to be an efficient catalyst for the disproportionation of allylicalcohols, which provides a convenient method for selective transformation of allylicalcohols to alkenes and α,β-unsaturated ketones. Furthermore, this catalytic system is also effective for highly selective allylicreduction of allylicalcohols, allylic ethers, and allylic acetates with benzyl alcohol under neutral and convenient
FeCl3·6H2O-catalyzed selective reduction of allylic halides to alkenes with concomitant oxidation of benzylic alcohols to aldehydes
作者:HouCai Zhang、RuiTing Liu、XiGeng Zhou
DOI:10.1007/s11426-013-5042-2
日期:2014.2
Iron-catalyzed direct reduction of allylic halides with benzylic alcohol was achieved, providing a new, simple, and efficient method for conducting highly regioselective hydrodehalogenation. This method not only features a readily available reductant, an inexpensive catalyst, simple manipulation, and good tolerance of functional groups including nitriles, nitro, esters, and methoxyl groups, it also