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Toplam kayıt 6439, listelenen: 3919-3938
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Microwave-assisted synthesis of 4′-azaflavones and their n-alkyl derivatives with biological activities
(Wiley, 2008)4?-Azaflavone (=2-(pyridin-4-yl)-4H-1-benzopyran-4-one; 4) and 3-[(pyridin-4-yl)methyl]-4?-azaflavone (5) were synthesized by a simple environmentally friendly microwave-assisted one-pot method through the cyclization of ... -
Microwave-assisted synthesis of benzimidazoles and their derivatives from 1994 to 2016-A review
(Bentham Science Publ Ltd, 2017)Background: the use of microwave irradiation is an important development for the synthesis of benzimidazoles in the 21st century, and in recent years, microwave-assisted heterocyclic synthesis has gained significant attention ... -
Microwave-assisted synthesis of new benzimidazole derivatives with lipase inhibition activity
(Taylor & Francis Ltd, 2014)A practical protocol has been used for the synthesis of benzimidazoles. the reaction of iminoester hydrochlorides of phenylacetic with 4,5-dichloro-1,2-phenylenediamine under microwave irradiation leads to the benzimidazole ... -
Microwave-assisted synthesis of novel 2,4-dihydro-5-[4-(trifluoromethyl) phenyl]-3h-1,2,4-triazol-3-ones and potentiometric determination of their pKa in nonaqueous solvents
(Wiley, 2010)The novel 4-amino- or 4-aryl-substituted 2,4-dihydro-5-[(4-trifluoromethyl) phenyl]-3H-1,2,4-triazol-3-ones 3a-3g were synthesized by reaction of N-(ethoxycarbonyl)-4-(trifluoromethyl)benzenehydrazonic acid ethyl ester (2) ... -
Microwave-assisted synthesis of novel mannich base and conazole derivatives containing biologically active pharmacological groups
(Bentham Science Publishers, 2021)Background: The aim of this study was to synthesize new Mannich bases and conazol derivatives with biological activity by the microwave-assisted method. Introduction: 1,2,4-Triazole-3-one (3) acquired from tryptamine was ... -
Microwave-assisted synthesis of some 1, 2, 4-triazol-3-ones and potentiometric determination of their pKa in amfiprotic and dipolar aprotic-water mixtures
(0-Belirlenecek, 2013)The novel 5-alkyl(aryl)-4-(aryl)-2, 4-dihydro-3H-1, 2, 4-triazol-3-ones (1-12) were synthesized by reaction of (N?-ethoxycarbonyl)-4-alkyl(aryl)hydrazonic acid ethyl ester with primary amines by microwave irradiation. ... -
Microwave-assisted synthesis of some 1H-1,2,4-triazol-3-one derivatives
(Bureau Scientific Publ, 2013)4-Amino-5-(methyl/ethyl)-2,4-dihydro-3H-1,2,4-triazol-3-one were synthesized from the reaction of (methyl/ethyl)-ester ethoxycarbonyl hydrazone with hydrazine hydrate and then, converted to corresponding Schiff bases using ... -
Microwave-assisted synthesis of some 2-substituted quinazolin-4(3h)-one derivatives from imıioester hydrochlorides
(Editura Acad Romane, 2014)Herein, a method that involves a reaction of iminoester hydrochloride with methyl anthranilate via microwave assisted synthesis is reported. This efficient procedure provides pure products within few minutes. This method ... -
Microwave-assisted synthesis of some 5(6)-nitro-1h-benzimidazoles and their hydrazide derivatives
(Chem Soc Ethiopia, 2013)A series of 5(6)-nitro-1H-benzimidazole and their hydrazide derivatives were synthesized starting from iminoester hydrochloride and 4-nitro-o-phenylenediamine under microwave irradiation. the structure of all synthesized ... -
Microwave-assisted synthesis of some hybrid molecules containing penicillanic acid or cephalosporanic acid moieties and investigation of their biological activities
(Springer Birkhauser, 2014)Ethyl 4-amino-2-fluorophenylpiperazin-1-carboxylates containing a 1,3-oxazol(idin)e, 5-thioxo-1,2,4-triazole, 1,3,4-thiadiazole, 5-thioxo-1,3,4-oxadiazole, or 1,3-thiazole nucleus were obtained starting from ethyl ... -
Microwave-assisted synthesis of some new benzimidazole derivatives with their antimicrobial activity
(Bentham Science Publ Ltd, 2015)2-(2-Chlorobenzyl)-1H-benzimidazole (2) was prepared from the reaction of o-phenylenediamine and ethylimido-o-chlorophenylacetate hydrochloride (1) under microwave irradiation. the acetate and hydrazide derivatives of 2(2- ... -
Microwave-assisted synthesis of some new benzylidenamino compounds and potentiometric determination of their pKa
(2012)A growing body of literature has shown the effectiveness of using microwaves in chemical reactions. The aim of this study is to demonstrate a rapid and highly efficient synthesis of some new benzylidenamino compounds (4a-f) ... -
Microwave-assisted synthesis of some new coumarin derivatives including 1,2,4-triazol-3-one and investigation of their biological activities
(Springer, 2015)By using the microwave technology, a new protocol has been developed for the synthesis of new coumarin derivatives including 1,2,4-triazol-3-one skeleton. This protocol proves to be efficient and environmentally friendly ... -
Microwave-assisted synthesis of some novel benzimidazole derivatives containing imine function and evaluation of their antimicrobial activity
(Wiley, 2014)4-Bromo-o-phenylenediamine and ethylimido-p-bromophenylacetate, 1, were subjected to microwave irradiation to synthesize benzimidazole derivative, compound 2. Ester derivative, 3, and hydrazide derivative, 4, of compound ... -
Microwave-assisted synthesis, characterization and aggregation properties of novel metallophthalocyanines containing 2-aminothiophenol moieties
(Chem Soc Pakistan, 2018)The microwave-assisted synthesis and characterization of novel peripherally 2-aminothiophenol substituted metallophthalocyanines (M: Ni(II), Zn(II)) have been reported for the first time in this study. All the new compounds ... -
Microwave-assisted synthesis, characterization and aggregation properties of phthalocyanines containing azo dye
(Asian Journal of Chemistry, 2013)The new zinc phthalocyanines substituted with azo compound are described. Firstly, azo compound (I) was synthesized by treating phenol with 4-iodoaniline. Then phthalonitrile compounds (1, 2 and 3) were synthesized by ... -
Microwave-assisted synthesis, characterization and spectral properties of non-peripherally tetra-substituted phthalocyanines containing eugenol moieties
(Elsevier Science Bv, 2015)The microwave-assisted synthesis and characterization of novel non-peripherally eugenol substituted metallophthalocyanines (M: Co(II), Ni(II), Cu(II), Zn(II)) have been reported for the first time in this study. All the ... -
Microwave-promoted synthesis and biological activity of some 2-hetarylmethyl-4-(4-hetarylphenyl)-5-methyl-2,4-dihydro-3H-1,2,4-triazol-3-one derivatives
(Springer, 2015)A series of fused and non-fused 1,2,4-triazole derivatives were prepared starting from ethyl 4-[1-(2-ethoxy-2-oxoethyl)-3-methyl-5-oxo-1,5-dihydro-4H-1,2,4-triazol-4-yl]benzoate. Firstly, both ethyl ester groups were ... -
Middle school students' employments of gestural signs: A case study
(Dublin City Univ Glasnevin Campus, Inst Education, 2017)In this research study, we investigated how middle school students created 3-dimensional objects from 2-dimensional figures using an extrusion method. in a summer enrichment program, students used manipulatives and a dynamic ... -
Middle school students' employments of gestures for forming three-dimensional objects using an extrusion or spinning method
(Elsevier Science Inc, 2019)This case study addresses how middle school students use gestures concomitant with verbal expressions to relate the features of two- and three-dimensional objects. Eight students (five girls and three boys) participated ...
