Acidity and Stability of 10-Substituted 1,8-Dihydroxy-9(10H)-anthracenones
作者:Klaus Müller、Ingo Gawlik、Wolfgang Wiegrebe
DOI:10.1002/ardp.19953280412
日期:——
The decomposition of 10‐substituted anthralin derivatives in dimethylsulfoxide and ethanol was determined. While 10‐ω‐phenylalkylidene derivatives were thoroughly stable, 10‐ω‐phenylacyl‐substituted compounds were slowly degraded to danthron and the corresponding carboxylicacids. However, the stability of these derivatives was markedly improved as compared to that of anthralin. Determination of the
Synthese und Pharmakodynamische Aktivität von 2-(3-(2-Phenylethyl)benzofuran-2-yl)-N-propyl-ethanamin
作者:G. Ecker、T. Helml、W. Fleischhacker、C. R. Noe、Christian Studenik、Bettina Schade、Peter Heistracher
DOI:10.1002/ardp.19953280410
日期:——
Im Rahmen von Struktur‐Wirkungs‐Untersuchungen an Klasse I‐Antiarrhythmika wurden die Benzofuranethanamine 3a und 3b synthetisiert, und 3a wurde pharmakologisch geprüft. Schlüsselschritt der Synthese war die chemoselektive Reduktion des Chloracetyl‐Dihydrobenzofurans 5 zum Chlorethylbenzofuran 9 mit Triethylsilan/BF3 · Et2O. Die Ergebnisse einer Reihe weiterer Reduktionsversuche von 5 werden ebenfalls
A Method for the Synthesis of 2,3-Disubstituted 2,3-Dihydrobenzofurans
作者:Danilo Annibali、Gerhard Ecker、Wilhelm Fleischhacker、Thomas Helml、Wolfgang Holzer、Christian R. Noe
DOI:10.1007/s007060050318
日期:2000.1.15
The synthesis of 2,3-disubstituted 2,3-dihydrobenzofuran diastereomers is described. The key step in the reaction sequence is the chemoselective reduction of a tert. alcohole with tert.-butylamine-borane/AlCl3. The relative configuration of the substituents on the dihydrofurane moiety was assigned via NMR spectroscopy.
Structure−Activity Relationship Studies on Benzofuran Analogs of Propafenone-Type Modulators of Tumor Cell Multidrug Resistance
作者:Gerhard Ecker、Peter Chiba、Manuela Hitzler、Diethard Schmid、Klaus Visser、Hans Peter Cordes、Josef Csöllei、Joachim K. Seydel、Klaus-Jürgen Schaper
DOI:10.1021/jm960384x
日期:1996.1.1
A series of benzofurylethanolamine analogs of propafenone (1a) have been prepared and evaluated for multidrugresistance-reversingactivity in two in vitro assay systems. As for propafenones, an excellent correlation of biological data with calculated lipophilicity values was found for benzofurans, whereby the latter generally had lower activity/lipophilicity ratios. Almost identical slopes of the