Synthesis of Fused Oxazolocoumarins from <i>o</i>
-Hydroxynitrocoumarins and Benzyl Alcohol Under Gold Nanoparticles or FeCl<sub>3</sub>
Catalysis
作者:Evangelia-Eirini N. Vlachou、Gerasimos S. Armatas、Konstantinos E. Litinas
DOI:10.1002/jhet.2842
日期:2017.7
Synthesis of fused oxazolocoumarins has been achieved from the one‐pot tandem reactions of o‐hydroxynitrocoumarins with benzyl alcohol in toluene undercatalysis in a sealed tube at 150°C. The catalysis was performed by gold nanoparticles supported on TiO2 (0.4 mol% Au) or FeCl3 (5%) or silver nanoparticles supported on TiO2 (1.7 mol% Ag).
Tricyclic heteroaromatic systems. Synthesis and benzodiazepine receptor affinity of 2-substituted-1-benzopyrano[3,4-d]oxazol-4-ones, -thiazol-4-ones, and -imidazol-4-ones
A number of 2-aryl-substituted-1-benzopyrano[3,4-d] oxazol-4-ones 1, -thiazol-4-ones 2 and -imidazol-4-ones 3 were synthesized. Benzodiazepine receptor (BZR) binding assays were performed on these series of tricyclic heteroaromatic systems. None of the tested compounds showed detectable affinity for BZR. Comparative structure-activity relationship analysis between the reported compounds and some known BZR ligands of similar size and shape revealed that, according to a two-dimensional schematic representation of the interaction of these kinds of tricyclic heteroaromatic systems with the BZR recognition site, the nature of the optional a. proton acceptor is of significant importance in the receptor-ligand interaction. (C) 1998 Elsevier Science S.A. All rights reserved.
PONOMAREV, O. A.;BRUSILTSEV, YU. N.;GRIF, V. X.;MITINA, V. G., YKP. XIM. ZH., 56,(1990) N, S. 272-276
作者:PONOMAREV, O. A.、BRUSILTSEV, YU. N.、GRIF, V. X.、MITINA, V. G.