2-(Substituted phenyl)oxazolo[4,5-b]pyridines and 2-(substituted phenyl)oxazolo[5,4-b]pyridines as nonacidic antiinflammatory agents
作者:Robert L. Clark、Arsenio A. Pessolano、Bruce Witzel、Thomas Lanza、T. Y. Shen、C. Gordon Van Arman、Edwin A. Risley
DOI:10.1021/jm00209a014
日期:1978.11
Some 2-(substitutedphenyl)oxazolo[4,5-b]pyridines and 2-(substitutedphenyl)oxazolo[5,4-b]pyridines have good antiinflammatory and analgesic activity. A few possess activity comparable to phenylbutazone or indomethacin without producing the irritation in the gastrointestinal tract that acidic antiinflammatory compounds cause.
The present paper describes a silica-supported, perchloric-acid-catalyzed, efficient protocol for the synthesis of 2-(phenyl)oxazolo[4,5-b]pyridine derivatives. This strategy has high conversion, simple workup procedures, ambient conditions, short reaction times, and a reusable catalyst. Structures of the synthesized compounds have been established on the basis of elemental analysis and spectral data (IR, H-1 NMR, C-13 NMR, and mass spectrometry). Moreover, to investigate the mechanistic details of the reaction and to ascertain the regioselective outcome of the product, local nucleophilicity descriptors N-k at B3LYP/6-311G++(d, p) level were determined and analyzed.
US4038396A
申请人:——
公开号:US4038396A
公开(公告)日:1977-07-26
US4131677A
申请人:——
公开号:US4131677A
公开(公告)日:1978-12-26
In vitro and in silico evaluation of 2-(substituted phenyl) oxazolo[4,5-b]pyridine derivatives as potential antibacterial agents
against enterotoxin protein of S. aureus which belongs to Staphylococcal enterotoxin type A(SEA). In vitro and in silico studies revealed that compounds 3d, 3g, and 3h have demonstrated significant antibacterial activity in comparison to the standard control drug ampicillin and streptomycin.