نتایج جستجو برای: 2 azetidinones
تعداد نتایج: 2525267 فیلتر نتایج به سال:
Sir: As reported in our previous paper,1) chemical modification of sulfazecin2) at the 3-position significantly enhanced its antibacterial activity; however, further improvement was desired especially in regard to the stability to some p-lactamases. We focused our attention on modifying the unexplored 4-position, and cis-1-(2,4dimethoxybenzyl)4methoxycarbonyl3 -phthalimido-2-azetidinone (1a) wa...
A series of 4-(2,5-dimethylpyrrol-1-yl)/4-pyrrol-1-yl benzoic acid hydrazide analogs, some derived triazoles, azetidinones, thiazolidinones, and pyrroles have been synthesized in good yields and structures of these compounds were established by IR, (1)H NMR, (13)C NMR, mass spectral, and elemental analysis. These compounds were evaluated for their preliminary in vitro antibacterial, antifungal,...
New series of N-(arylidene)hydrazinoacetyl sulfonamides 4a1-6, 4b1-6 and N-(4-aryl-3-chloro-2-oxoazetidin-1-yl)aminoacetyl sulfonamides 5a1-6, 5b1-6 were synthesized. The structures of the new derivatives was confirmed using spectral methods (FT-IR, 1H-NMR, 13C-NMR). The antibacterial activities of these compounds against Gram positive (Staphylococcus aureus ATCC 6583, Staphylococcus epidermidi...
2-Aminobenzothiazole-6-carboxylic acid (1), on condensation with chloroacetyl chloride yielded 2-(2-chloroacetylamino)benzothiazole-6-carboxylic acid (2), which on amination with hydrazine hydrate yielded in turn 2-(2-hydrazinoacetylamino)benzo-thiazole-6-carboxylic acid (3). Compound 3, on condensation with various aromatic aldehydes afforded a series of 2-{2-[N'-(arylidene)hydrazino]acetylami...
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