نتایج جستجو برای: benzoxazole
تعداد نتایج: 371 فیلتر نتایج به سال:
A group of novel heterocyclic arylsulfonamide derivatives were synthesized by three steps process using the organic and inorganic catalyst in less solvent at ambient temperature. One out three-steps process, one-pot multiple component reaction reusable catalyst. These compounds reactions proceed through Knoevenagel condensation accompanied Michael addition to obtaining suspicious products. The ...
Electroabsorption is used to determine the difference dipole moment, NDmN , and the difference polarizability, Da , of Ž . HBT and HBO, two molecules that undergo excited-state intramolecular proton transfer ESIPT . These measurements are Ž ). Ž . compared to ab initio 6-31G and semi-empirical INDO1rs calculations. Good agreement is obtained between ab initio and experimental NDmN values. Howev...
(Traders) 1.0%, yeast extract 0.1%, and CaCO3 0.2% (pH 7.2). The fermentation was carried out at 28°C on a rotary shaker (180 rpm) for 96 hours. The culture broth of Streptomyces sp. AJ9561 (5 liters) was filtered to obtain mycelium, which was extracted with acetone (3 liters) at room temperature. The extract was concentrated in vacuo to an aqueous suspension, which was extracted with EtOAc (50...
The synthesis of (S)-2-(4-tert-butylphenoxy)-3-(benzoxazol-5-yl) propanoic acid derivatives (2a-k) were described and their in vitro antibacterial activities were determined against Gram-negative and -positive bacteria. These compounds were found to exert a broad spectrum of activity against the screened bacteria, but poor MIC values were found for Candida albicans fungi. Compound 2b bearing a ...
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