نتایج جستجو برای: 2-Thiouracil

تعداد نتایج: 2525507  

2016
Mohammad R. Ahmed Khalid M. Mohammad Mahmoud H. Mahmoud

This research, involved synthesis of a series of new compound containing different derivatives. The synthesis involved treatment of 6methyl 2-thiouracil with chloroacetyl chloride to give 1chloroacetyl 6methyl 2-thiouracil (1) .The product was treat with hydrazine hydrate to give 2( aceto hydrazide ) thiouracil (2), and with phenyl hydrazine to give phenyl hydrazide thiouracil (13). The new der...

Journal: : 2023

This research includes synthesis of new heterocyclic containing (1,3-oxazepine) derivatives 6- methyl 2-thiouracil. The preparation process started by the reaction 2-thiouracil with ethyl chloroacete to give 2-((4-hydroxy-6-methylpyrimidin-2-yl) thio) acetate (1). Compound (1) reacted hydrazine hydrate 2-((4-hydroxy-6-methylpyrimidin-2-yl)thio) aceto hydrazide (2). That various substituted benz...

The electrochemical oxidation of methyl catechol in the presence of 2-thiouracil (as a nucleophile) has beenperformed in aqueous solutions using cyclic voltammetry and controlled-potential coulometric techniques.The electrochemical behavior of methyl catechol in the presence of 2-thiouracil was investigated. Theelectrochemical synthesis of this compound has been successfully performed in an und...

Journal: :Journal of agricultural and food chemistry 2011
Julie Vanden Bussche Julie A L Kiebooms Nathalie De Clercq Yoann Deceuninck Bruno Le Bizec Hubert F De Brabander Lynn Vanhaecke

In recent years, questions have been raised on the possible semi-endogenous status of the alleged xenobiotic thyreostatic drug thiouracil; thiouracil has been detected in the urine of various animals (livestock and domesticated) at concentrations between 1 and 10 μg L(-1) and also in human urine. Although several studies suggest Brassicaceae-derived feed as potential origin, no traces of thiour...

Journal: :Cancer research 1948
K E PASCHKIS A CANTAROW J STASNEY

Bielschowsky (2) reported the occurrence of carcinoma in the rat's thyroid gland made hyperplastic by administration of allyl thiourea when the carcinogen, 2-acetaminofluorene (AAF) was administered simultaneously. Applying a similar principle, we investigated the effects of administration of this carcinogen to rats in which hyperplasia of target organs was produced by injection of male and fem...

Journal: :physical chemistry and electrochemistry 0

the electrochemical oxidation of methyl catechol in the presence of 2-thiouracil (as a nucleophile) has beenperformed in aqueous solutions using cyclic voltammetry and controlled-potential coulometric techniques.the electrochemical behavior of methyl catechol in the presence of 2-thiouracil was investigated. theelectrochemical synthesis of this compound has been successfully performed in an und...

Journal: :The Journal of biological chemistry 1977
L K Kwong V G Moore I I Kaiser

Transfer RNAs isolated from Escherichia coli B grown in the presence of 2-thiouracil are deficient in pseudouridine. Much of this deficiency is from the T psi C region, which has only about 50% of its normal pseudouridine content. The other modified nucleoside from this region, ribothymidine, is reduced by only about 10%. Studies showed that 2-thiouracil is incoproated into the RNA of E. coli d...

Journal: :The Journal of biological chemistry 1954
D B STROMINGER M FRIEDKIN

In a survey of various substrates for pyrimidine nucleoside synthesis, it was noted that inorganic orthophosphate was released when 2-thiouracil and desoxyribose-l-phosphate were incubated together with thymidine phosphorylase (1). This finding, taken as a fairly certain indication of nucleoside synthesis, has now been fully substantiated by isolation and characterization of crystalline thioura...

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