Iodine (III)-mediated synthesis of some 2-aryl/hetarylbenzoxazoles as antibacterial/antifungal agents
摘要:
Ten 2-aryl/hetarylbenzoxazoles (5a, 5b, and 6a-h) were synthesized via oxidative cyclization of Schiff bases (3a, 3b, and 4a-h) with 1.1 equivalent of iodobenzene diacetate (IBD) in methanol. All of these 2-aryl/hetarylbenzoxazoles (5a, 5b, and 6a-h) were tested in vitro for their antibacterial and antifungal activities against Bacillus subtilis, Bacillus stearothermophilus, Escherichia coli, and Pseudomonas putida. These compounds also were screened for their antifungal activity against Aspergillus flavus and Aspergillus niger. Biological activity of these compounds was compared with those of commercially available antibiotics, chloramphenicol and antifungal agent cycloheximide. Most of these compounds, 5a, 5b, 6a, 6b, 6d, 6e, 6g, 6h, were equipotent or more potent than these commercial drugs at concentration 100 mu g/ml.
Ruthenium(II) Acetate Catalyzed Synthesis of Silylated Oxazoles via C–H Silylation and Dehalogenation
作者:Shun Liu、Shiling Zhang、Qiao Lin、Yiqi Huang、Bin Li
DOI:10.1021/acs.orglett.9b00085
日期:2019.2.15
efficient ruthenium(II)-catalyzed intermolecular selective ortho C–H silylation of 2-aryloxazoles has been described for the first time, which provides a convenient and practical pathway for the synthesis of versatile organosilane compounds with good functional group tolerance and regioselectivity. This catalytic system could be also applied to the dehalogenation of Cl or Br group.
Palladium‐Catalysed Direct C‐H Activation/Arylation of Heteroaromatics: An Environmentally Attractive Access to Bi‐ or Polydentate Ligands
作者:Fazia Derridj、Aditya L. Gottumukkala、Safia Djebbar、Henri Doucet
DOI:10.1002/ejic.200800143
日期:2008.6
Bi- or polydentateligands based on heterocycles can be easily prepared by palladium-catalysed C–H bond activation of heteroaromatics followed by heteroarylation with heteroaryl bromides. A variety of heteroaromatics such as furans, thiophenes, pyridines, thiazoles or oxazole derivatives have been employed and moderate to good yields were generally obtained using the air-stable complex [PdCl(dppb)(C3H5)]
12. Anil-Synthese. 17. Mitteilung. Über die Herstellung von styryl-derivaten des 2-phenyl-4<i>H</i>-1,2,4-triazolo [1,5-<i>a</i>]pyridins
作者:Jean-Paul Pauchard、Adolf Emil Siegrist
DOI:10.1002/hlca.19780610115
日期:1978.1.25
Preparation of styryl derivatives of 2-phenyl-4H-1,2,4-triazolo [1,5-a]pyridine
2-苯基-4 H -1,2,4-三唑并[1,5- a ]吡啶的苯乙烯基衍生物的制备
Anil-Synthese. 10. Mitteilung. Über die Darstellung von Styryl-Derivaten des Dibenzofurans
作者:Jacques Garmatter、Adolf Emil Siegrist
DOI:10.1002/hlca.19740570402
日期:1974.4.27
Schiff'sche Basen des Dibenzofuran-2- bzw. -3-carbaldehydes mit p-Chloranilin können mit p-tolyl-substituierten heterocyclischen und carbocyclischen Aromaten in Gegenwart von Dimethylformamid und Kaliumhydroxid bzw. Kalium-t-butylat in die entsprechenden Styryl-Derivate übergeführt werden (« Anil-Synthese »).
希夫“血清胆碱酯酶倍欣DES二苯并呋喃-2- bzw. 在Gegenwart von Dimethylformamid和Kaliumhydroxid bzw中的-3-甲醛与对氯苯胺(Chloranilinkönnen)与对甲苯基取代的杂环和碳环的芳香化合物。Entsprechenden苯乙烯-衍生物übergeführtwerden(«Anil-Synthese»)中的叔丁基钾。
Anil-Synthese. 19. Mitteilung. Über die Herstellung von Stilbenyl-Derivaten des Isoxazols
作者:Hanny Berger、Adolf Emil Siegrist
DOI:10.1002/hlca.19790620315
日期:1979.4.20
Preparation of Stilbenyl Derivatives of Isoxazoles