(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
Versatile Synthesis of Cyclopropanecarboxylic Acid Derivatives by the Ni(CO)<sub>4</sub>-Induced Reductive Carbonylation Reaction of<i>gem</i>-Dibromocyclopropanes
Reductive carbonylation of gem-dibromocyclopropanes was achieved by treatment with tetracarbonylnickel in the presence of alcohols, amines, thiols, or imidazole in DMF leading to the corresponding cyclopropanecarboxylic acid derivatives, respectively. Use of disulfides as an initial nucleophile resulted in carbonylation with sulfenylation at the geminal position. This method was applied to the intramolecular
Stereodivergent Intramolecular Cyclopropanation Enabled by Engineered Carbene Transferases
作者:Ajay L. Chandgude、Xinkun Ren、Rudi Fasan
DOI:10.1021/jacs.9b02700
日期:2019.6.12
myoglobin biocatalysts for executing asymmetric intramolecular cyclopropanations resulting in cyclopropane-fused γ-lactones, which are key motifs found in many bioactive molecules. Using this strategy, a broad range of allyl diazoacetate substrates were efficiently cyclized in high yields with up to 99% enantiomeric excess. Upon remodeling of the active site via protein engineering, myoglobin variants
Synthesis and biological evaluation of novel 2-(1H-imidazol-4-yl)cyclopropane carboxylic acids: key intermediates for H3 histamine receptor ligands
作者:Miguel F Braña、Cristina Guisado、Luis Fernando Alguacil、Elisa Garrido、Carmen Pérez-Garcı́a、Mariano Ruiz-Gayo
DOI:10.1016/s0960-894x(02)00793-x
日期:2002.12
A new synthetic methodology to provide cis-2-(1H-imidazol-4-yl)-cyclopropane carboxylic acids is described. These cyclopropanes are useful for the preparation of novel H-3 receptor agents. (C) 2002 Elsevier Science Ltd. All rights reserved.