Synthesis of Novel 2-Aminothiophene-3-carboxylates by Variations of the Gewald Reaction
作者:Hans-Peter Buchstaller、Carsten D. Siebert、Ralf H. Lyssy、Ina Frank、Adil Duran、Rudolf Gottschlich、Christian R. Noe
DOI:10.1007/s007060170137
日期:2001.2.15
compounds through variations of the Gewald reaction is presented. Knoevenagel condensation of methylketone derivatives with methyl cyanoacetate and subsequent treatment of the α,β-unsaturated nitriles with sulfur and amine resulted in the corresponding 2-aminothiophenes 5 or isomers 9 and 10 . Reaction of methylketone derivatives bearing a leaving group at the methylgroup under modified Gewald conditions selectively
Synthesis of Thieno[2,3-<i>b</i>]Pyridinones Acting as Cytoprotectants and as Inhibitors of [<sup>3</sup>H]Glycine Binding to the <i>N</i>-Methyl-<scp>d</scp>-aspartate (NMDA) Receptor
作者:Hans-Peter Buchstaller、Carsten D. Siebert、Ralf Steinmetz、Ina Frank、Michael L. Berger、Rudolf Gottschlich、Joachim Leibrock、Michael Krug、Dieter Steinhilber、Christian R. Noe
DOI:10.1021/jm0503493
日期:2006.2.1
nolin-2(1H)-one (21), was used as a template for bioisostere benzene/thiophene exchange. Phenylacetylation of aminothiophene carboxylic acid methyl esters and subsequent cyclization delivered the three possible thienopyridinone isomers. 4-Hydroxy-5-phenylthieno[2,3-b]pyridin-6(7H)-one (3a), with the shortest distance between the sulfur and the nitrogen atom, was the most potent isomer (K(i) against