Results 181 to 190 of about 5,785 (211)
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2, 5-Dialkyl-1, 3, 4-oxadiazoles
Chemistry of Heterocyclic Compounds, 1970A single stage method has been developed for the preparation of 2, 5-dialky-1, 3, 4-oxadiazoles from aliphatic carboxylic acids, by boiling with hydrazine hydrochloride in phosphoryl chloride. A mechanism for the synthesis is suggested. The oxadiazoles are characterized, and the group refractivity of the 1, 3, 4-oxadiazole ring has been determined.
M. S. Skorobogatova +2 more
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Synthesis of 1, 3, 4-Oxadiazole
Asian Journal of Research in Chemistry, 2017Synthesis of 1, 3, 4-oxadiazole by the reaction of 2-propyl Benzo imidiazol-2-yl carbohydrazide and 1, 3, dihydro iso indo-2-yl acetic acid (Phthalyl Amino Acids) in presence of HCl and phosphoryl chloride. All the newly synthesized compounds were screened antibacterial activity which shows moderate to mild activity, and yield of the synthesized ...
Maqdoom Farooqui, Syed Nazimuddin
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Synthesis and study of poly (1, 3, 4-oxadiazoles)
Chemistry of Heterocyclic Compounds, 1967Various conditions for synthesizing poly (1,3,4-oxadiazoles) from carboxylic acids, their hydrazides, and polyhydrazides, are investigated. Methods of cyclodehydration of polyhydrazides using phosphorus oxychloride, sulfuric acid, and certain other reagents are not of general utility for synthesizing poly (1,3,4-oxadiazoles).
A. P. Grekov +2 more
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Poly(1, 3, 4-Oxadiazole-Amide)s Containing Pendent Phenoxy Groups
High Performance Polymers, 1996A series of new poly(1, 3, 4-oxadiazole-amide)s have been synthesized by solution polycondensation of aromatic diamines containing preformed 1, 3, 4-oxadiazole rings with phenoxyterephthalic diacid chloride or by the reaction of the same diacid chloride with p-aminobenzhydrazide resulting in a polyhydrazide-amide which was cyclodehydrated to the ...
Corneliu Hamciuc +2 more
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SYNTHESIS AND ANTIMICROBIAL ACTIVITIES OF SOME NEW 1, 3, 4-OXADIAZOLES
INDIAN DRUGS, 2012Various 5-β-[(N-Benzenesulphonyl/tosyl)-4-(un) substituted anilino] ethyl-2-H/CH3/C6H5/-CH2C6H5/p-NO2C6H4-1,3,4-oxadiazoles (5a-d), 5--β-[(N-Benzenesulphonyl/tosyl)-4-(un)-substituted anilino] ethyl-2-(N,N-diethylamino/anilino/morpholino)-1, 3, 4-oxadiazoles (6a-r), 3--β-[(N-Benzenesulphonyl/tosyl)-4-(un) substituted anilino] ethyl-4-amino-5-mercapto-4(
S Desai, U. Laddi
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Synthesis of Some New 1, 3, 4-Oxadiazole, Pyrazole, and Pyrimidine Bearing Thienopyrazole Moieties
Current Organic Synthesis, 2020Aim and Objective: According to the literature survey, pyrazole is a unique template that is associated with several biological activities. This article highlighted the research work of many researchers reported in the literature for synthesis and different pharmacological activities of the pyrazole nucleus.
Mohamed Ahmed Elian Sophy +1 more
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Recent Advances in 1, 3, 4-Oxadiazole Chemistry
1967Publisher Summary This chapter introduces the chemistry of the 1,3,4-oxadiazoles. The 1,3,4-oxadiazoles have large number of applications in diverse areas—for example, in drug syntheses, scintillation materials, and the dyestuffs industry. Ring cleavage reactions of the 1,3,4-oxadiazoles have also excited great interest in various fields, because ...
A. Hetzheim, K. Möckel
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Synthesis Of 3-Aryl-5-[Thien-3-Yl Methyl]-1,2, 4-Oxadiazoles
Synthetic Communications, 1999Abstract A convenient and efficient synthesis of eight new compounds 5a-h is described. The intermediates 4a-h have also been isolated and characterized the with help of spectroscopic data.
R. M. Srivastava +3 more
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1976
Publisher Summary This chapter focuses on the chemistry of 1,2,4-oxadiazoles and the corresponding reduced derivatives. The chapter discusses the synthesis of 1,2,4-oxadiazoles. Two widely used general methods of synthesizing 1,2,4-oxadiazoles embrace 95% of the practical preparations of these compounds: The conversion of amidoximes by means of ...
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Publisher Summary This chapter focuses on the chemistry of 1,2,4-oxadiazoles and the corresponding reduced derivatives. The chapter discusses the synthesis of 1,2,4-oxadiazoles. Two widely used general methods of synthesizing 1,2,4-oxadiazoles embrace 95% of the practical preparations of these compounds: The conversion of amidoximes by means of ...
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Investigation of 1, 3, 4-Oxadiazole Scaffold as Potentially Active Compounds
International Journal of Drug Design and Discovery, 2011In the present work, various Schiff’s bases of isoniazid bearing 1, 3, 4-oxadiazole nucleus were synthesized. These compounds were purified, characterized and evaluated in vitro for antibacterial, antifungal and antiviral activities. Compound 5 showed better biological profile.
Rakesh R. Somani +4 more
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