(2<i>S</i>,1‘<i>S</i>,2‘<i>S</i>,3‘<i>R</i>)-2-(2‘-Carboxy-3‘-methylcyclopropyl) Glycine Is a Potent and Selective Metabotropic Group 2 Receptor Agonist with Anxiolytic Properties
作者:Iván Collado、Concepción Pedregal、Angel Mazón、Juan Félix Espinosa、Jaime Blanco-Urgoiti、Darryle D. Schoepp、Rebecca A. Wright、Bryan G. Johnson、Ann E. Kingston
DOI:10.1021/jm0110486
日期:2002.8.1
asymmetric synthesis and biological activity of (2S,1'S,2'S,3'R)-2-(2'-carboxy-3'-methylcyclopropyl) glycine 7 and its epimer at the C3' center 6 are described. Compound 7 is a highly potent and selective agonist for group 2 metabotropric glutamate receptors (mGluRs). It is also systemically 4 orders of magnitude more active in the fear-potentiated startle model of anxiety in rats than the rigid constrained
Ag–Cu nanoparticles as efficient catalysts for transesterification of β-keto esters under acid/base-free conditions
作者:Hongmei Yue、Hao Yu、Sheng Liu、Chunli Xu
DOI:10.1039/c6ra00467a
日期:——
Transesterification of β-ketoesters and alcohols are traditionally catalyzed by acid or basic catalysts. However, these traditional catalysts do not always meet the requirements of modern synthetic chemistry which need to be highlyefficient, selective, and environmentally friendly. In this work, Ag–Cu metal sites were first introduced as transesterification catalysts. The effect of the support, Ag : Cu
Stereoselective Synthesis of (±)-4-epi-acetomycin by the ester enolate carroll rearrangement
作者:Antonio M. Echavarren、Javier de Mendoz、Pilar Prados、Amparo Zapata
DOI:10.1016/0040-4039(91)80185-9
日期:1991.10
The synthesis of (+-)-4-epi-acetomycin has been completed by the steroselective esterenolate (Carrollrearrangement of (E)-2-butenyl 2-methylacetoacetate, followed by ozonolysis and acetylation. The synthesis of (±)- acetomycin and its three diastereomers by a related route is also described.
ESTER ENOLATE CLAISEN REARRANGEMENT OF 2-BUTENYL 3-HYDROXYBUTANOATE
作者:Tamotsu Fujisawa、Kazuhisa Tajima、Masamichi Ito、Toshio Sato
DOI:10.1246/cl.1984.1169
日期:1984.7.5
The ester enolateClaisenrearrangement of (E)- or (Z)-2-butenyl 3-hydroxybutanoate was found to give predominantly each one of four isomers of 3-methyl-4-methoxycarbonyl-5-hydroxy-1-hexene by the selection of the reaction conditions via the enolate dianions or silyl ketene acetals.