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)benzothiazole-6-carboxylic acid (3). Compound 3, on condensation with various aromatic aldehydes afforded a series of 2-{2-[N'-(arylidene)hydrazino]acetylamino}benzothiazole-6-carboxylic acids 4a-h, which upon dehydrative annulation in the presence of chloroacetyl chloride and triethylamine yielded 2-{2-[3-chloro-2-(aryl)-4-oxoazetidin-1-ylamino]-acetylamino}benzothiazole-6-carboxylic acids 5a-h. The synthesized compounds 4a-h and 5a-h were screened for their antibacterial activity against four microorganisms: Staphylococcus aureus (Gram positive), Bacillus subtilis (Gram positive), Psuedomonas aeruginosa (Gram negative) and Escherichia coli (Gram negative). They were found to exhibit good to moderate antibacterial activity. The antifungal activity of these compounds were also tested against three different fungal species. None of them were active against the species tested.
1,2-b]pyrano[3,4-d]thiazol-8-yl]spiroindoloazetidin-2-ones/thiazolidin-4-ones.-All products possess considerable antibacterial activity. -(SURYAVANSHI, J. P.; PAI*, N. R.; Indian J.
The condensation of 2-aminobenzothiazole-6-carboxylic acid (1) with chloroacetyl chloride in refluxing chloroform in the presence of anhydrous K 2 CO 3 gives 2-(2-chloroacetylamino)benzothiazole-6-carboxylic acid (2). Compound (2) on treatment with KSCN in refluxing acetone yields 2-(2-imino-4-oxo-thiazolidin-3-yl)benzothiazole-6-carboxylic acid (3). Compound (3) on condensation with various aromatic aldehydes affords a series of 2-[5-(arylidene)-2-imino-4-oxo-thiazolidin-3-yl]benzothiazole-6-carboxylic acid (4a-h). The synthesized compounds (4a-h) are screened for their antibacterial as well as antifungal activity. All the tested compounds show slight to moderate activity against the selected microorganisms.
2‐Amino‐5‐aryl/alkyl‐1,3,4‐thiadiazoles 3a‐e were synthesized from aliphatic and aromatic acids and thiosemicarbazide. These 2‐amino‐5‐aryl/alkyl‐1,3,4‐thiadiazoles 3a‐e were condensed with 2‐(naphthalenyloxymethyl) oxirane 4a‐b to prepare some naphthalenyloxy‐propanol amine derivatives 5a‐j. These compounds were synthesized as potential antihypertensive agents.
f o r f r e e d a s i t e h o s t e d b y M e d k n o w P u b ( w w w . m e d k n o w . c o m ) .A simple, precise, fast and selective HPLC method has been developed for the simultaneous estimation of lamivudine, zidovudine and nevirapine from tablets by external standard method. The analytes were resolved by using mobile phase of 50:50 mixture of methanol:buffer (0.1 M ammonium acetate in 0.5% glacial acetic acid) on an Inertsil ODS 3V (250 × 4.6 mm, 5 µ) column as a stationary phase and UV 270 nm as detection wavelength.
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