نتایج جستجو برای: schiff’s bases
تعداد نتایج: 67083 فیلتر نتایج به سال:
Benzofuranones have attracted considerable attention with regard to their pharmaceutical activity and the various approaches directed towards their synthesis .The simple benzofuran derivatives like 2-nitrobenzofuran, 2-acetyl benzofurans are well known as bio-dynamic agents possessing various pharmacological properties.spasmolytic activity on the intestine of the guinea pig and dilatory effects...
The novel titanium(IV) complexes of composition [TiCl2(SB)2] have been synthesized by reacting TiCl4 and Schiff bases (SBs) where (SBs = A1( tetracycline hydrochloride schiffs base) ;B1(Streptomycin schiffs base ) ;C1( Ceffixime schiffs base) ;D1( ampicillin schiffs base) in fixed molar ratio 1:2. Titanium and chlorine estimation were estimated by gravimetrical and Volhard method respectively. ...
Azomethine ylides were generated from Schiffs bases of S-allylcysteine methyl ester and their intramolecular 1,3-dipolar cycloadditions were studied. These reactions led to the synthesis of thieno[3,4b]pyrrole derivatives in good yield.
2-Amino-1,3-benzothiazole was synthesized and schiff bases were prepared by reacting a series of aromatic aldehydes with 2-amino-1,3-benzothiazole to form a number of potentially biologically active compounds. Azo dyes of 2-amino-1,3-benzothiazole were synthesized by reacting various aromatic amines , substituted amines and phenols. The structures of 2-amino-1,3-benzothiazole, Schiff bases and ...
The molecular mechanism of action of the antitumor drug, methylthioinosine periodate oxidation product, was demon strated. This periodate oxidation product (methylthioinosinedicarboxaldehyde) inhibited bovine pancreatic ribonuclease A. The inhibition was due to Schiffs base formation with e-amino groups of lysine residues, one of which was in close proximity to the catalytic center of the enzyme.
2-[N'-2-Pyrimidyl-aminobenzenesulfonamido] ethyl 4-bis(2-chloroethyl) aminophenyl butyrate has been prepared by reaction of chlorambucil with sulfadiazine derivative. Schiffs base has been used as the protective group of the aromatic amine in the synthesis. It can be completely removed by the irradiation of 365 nm UV light at room temperature. The title compound exhibits a high antitumor activi...
let h be a separable hilbert space and let b be the set of bessel sequences in h. by using several interesting results in operator theory we study some topological properties of frames and riesz bases by constructing a banach space structure on b. the convergence of a sequence of elements in b is de_ned and we determine whether important properties of the sequence is preserved under the con...
Hydrazones derivatives of carbonyl compounds constitute an important class of biologically active compounds. Metal complexes of Schiff bases represent an important class of coordination compounds. Schiffs base containing hetero donar atom continue to provide the interesting facts in the fields of coordination chemistry. Literature studies on hydrazones have shown that these derivatives possess ...
این پایان نامه برگرفته از مقاله زیر است g-frames and g-riesz bases, j. math. anal. appl. 322 (2006) 437-452."
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