نتایج جستجو برای: 3 methyl 2 benzothiazolinone hydrazone
تعداد نتایج: 3398666 فیلتر نتایج به سال:
Abstract Green analytical chemistry is one of the newest trends in nowadays targeting concept green laboratory practices on chemists and environment. In this text, are proposed work for determination sofosbuvir (SF) velpatasvir (VP) their pharmaceutical formulation. The analysis SF a binary mixture with VP represents an challenge due to complete overlapping UV spectrum by that VP. Therefore, di...
Four simple and sensitive visible spectrophotometric methods have been developed for the assay of dutasteride. Method I describes the interaction of dutasteride, as an n-electron donor, with chloranil, as a pi-acceptor, in acetonitrile to give reddish orange colored chloranil radical anion with absorption maxima at 525 nm. Method II involves the oxidative coupling reaction of dutasteride with 3...
1- (Phthalazin-l'-yl-amino)-3-chloro-4-aryl-4H-(4o-rm ethyl)-2-azetidinones (3) were prepared by cycloaddition of-methyl substituted benzal hydrazinophthalazine (2) with chloro acetylchloride. The hydrazone (2) was synthesised by the condensation of 1- hydrazinophthalazine (1) with substituted aromatic aldehydes, ketones 7 acetophenones. 1- Hydrazinophthalazine was prepared from the phthal...
Two new spectrophotometric methods (M1 and M2) are developed for the determination of vardenafil in bulk and in tablet dosage forms. The method M1 involves oxidative coupling of vardenafil with 3-methyl-2-benzothiazolinone hydrazone hydrochloride in presence of ferric chloride in acidic medium yielding green colored chromogen with absorption maxima at 625 nm. The method M2 is based on the oxida...
Fabrication of a test strip for detection of benzoic acid was successfully implemented by immobilizing tyrosinase, phenol and 3-methyl-2-benzothiazolinone hydrazone (MBTH) onto filter paper using polystyrene as polymeric support. The sensing scheme was based on the decreasing intensity of the maroon colour of the test strip when introduced into benzoic acid solution. The test strip was characte...
The fabrication of an optical biosensor by using stacked films where 3-methyl-2-benzothiazolinone hydrazone (MBTH) was immobilized in a hybrid nafion/sol-gelsilicate film and laccase in a chitosan film for the detection of phenolic compounds wasdescribed. Quinone and/or phenoxy radical product from the enzymatic oxidation ofphenolic compounds was allowed to couple with MBTH to form a colored az...
Some new isatin3hydrazone derivatives that are Isatin3(benzylidene)hydrazone, Isatin3-(methyl ethylide)hydrazone, isatin 3-(isoproplylidene)hydrazone have been synthesized from the reaction of isatin3-hydrazone and different aldehydes and ketones. Thestructure of synthesized compound is assigned on the basis of, IR, 1HNMR, 13CNMRdata. The anti microbial activity was done by disk diffusion metho...
two new spectrophotometric methods (m1 and m2) are developed for the determination of vardenafil in bulk and in tablet dosage forms. the method m1 involves oxidative coupling of vardenafil with 3-methyl-2-benzothiazolinone hydrazone hydrochloride in presence of ferric chloride in acidic medium yielding green colored chromogen with absorption maxima at 625 nm. the method m2 is based on the oxida...
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