N substituted 3-amino-2,2-di-c-alkyl-1,4-butyrolactones and 1,4-thiobutyrolactones for use as promoter of &ggr;-aminobutyric acid activity and for treating nervous disorders and preparation method
N-Substituted 4-Amino-3,3-dipropyl-2(3<i>H</i>)-furanones: New Positive Allosteric Modulators of the GABA<sub>A</sub> Receptor Sharing Electrophysiological Properties with the Anticonvulsant Loreclezole
作者:Ahmed El Hadri、Ahmed Abouabdellah、Urs Thomet、Roland Baur、Roman Furtmüller、Erwin Sigel、Werner Sieghart、Robert H. Dodd
DOI:10.1021/jm011082k
日期:2002.6.1
1,4-Addition of benzylamine to 2(5H)-furanone followed by dialkylation of the 3-position with allylbromide gave (+/-)-4-benzyl-3,3-diallyl-2(3H)-furanone (8), which served as the intermediate for the synthesis of various N-substituted 4-amino-3,3-dipropyl-2(3H)-furanones (+/-)-9a-l. The compounds were evaluated for their capacity to potentiate or inhibit GABA-evoked currents in Xenopus laevis oocytes
Asymmetric 1, 4-additions to 5-alkoxy-2 (5H)-furanonesenantioselective synthesis and absolute configuration determination of β-amino-δ-butyrolactones and amino diols
作者:B. de Lange、F. van Bolhuis、Ben L. Feringa
DOI:10.1016/s0040-4020(01)89149-3
日期:1989.1
es via asymmetric conjugate addition of various amines to 5-menthyloxy-2(5H)-furanone is described. This route provides access to new multifunctionalhomochiral building blocks. The absolute configuration of the β-amino-δ-butyrolactones is established by X-ray analysis and 1H NMR correlation. Theconjugate addition of amines to 2[5H]-furanone, 5-alkyl-2[5H]-furanones and 5-alkoxy-2[5H]-furanones was
描述了通过将各种胺不对称共轭加成到5-薄荷基氧基-2(5H)-呋喃酮中来合成对映体纯的β-氨基-δ-丁内酯。这条路线提供了通往新的多功能同构构件的途径。通过X射线分析和1 H NMR相关性确定了β-氨基-δ-丁内酯的绝对构型。研究了将胺共轭添加到2 [5H]-呋喃酮,5-烷基-2 [5H]-呋喃酮和5-烷氧基-2 [5H]-呋喃酮中,并观察到由于2 [5H]-呋喃酮具有增强的反应性,这是由于γ-烷氧基效应。不对称胺加成的合成效用以有效途径说明了各种光学纯的2-氨基-1,4-丁二醇的合成。
1,3-Dipolar cycloadditions of ethoxycarbonyl-nitrile benzylimine, EtOOC C N+ − N− CH2C6H5, and synthesis of β-amino acids. Synthesis and reactions of ethyl 2-chloro-2-ethoxyacetate and 2-chloro-2-ethoxyacetyl chloride
作者:Karen K. Bach、Hesham R. El-Seedi、Henrik M. Jensen、Helene B. Nielsen、Ib Thomsen、Kurt B.G. Torssell
DOI:10.1016/s0040-4020(01)90482-x
日期:——
syntheses of the title reagents were described. Ethyl 2-chloro-2-ethoxy-acetate gave selectively oximes, hydrazones, nitrones, and phosphonium salts with hydroxylamine, hydrazines, -substituted hydroxylamines and triphenylphosphine respectively. The phosphonium salt was used in a Wittig reaction with aldehydes to give α-ketoesters. Treatment of the acid chloride with allyl alcohols and subsequently with