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1.036.245  Articles
1 of 103.625 pages  |  10  records  |  more records»
In this study we have synthesized some Benzimidazole derivatives (2-{6-Chloro-5-nitro-1-[2-(1H-tetrazol-5-yl) biphenyl-4-ylmethyl] 1H-benzoimidazol-2-yl}-phenyl)-(Substituted-benzylidene)-amine and screened for their antihypertensive activity. 4-chloro-o-... see more

The reactions of [5+1]-cyclocondensation of [2-(3-aryl-1H-1,2,4-triazol-5-yl)phenyl]amines with aliphatic and aromatic ketones result in the corresponding 5-R-5-R1-2-aryl-5,6-dihydro-[1,2,4]triazolo[1,5-c]quinazolines with good yields. Modi? cation of the... see more

Reactions of [5+1]-cyclocondensation of [2-(3-aryl-1H-1,2,4-triazol-5-yl)phenyl]amines with aliphatic and aromatic aldehydes produce the corresponding 5-R-2-aryl-5,6-dihydro- or 5-R-2-aryl-[1,2,4]triazolo[1,5-?]quinazolines depending on the cond... see more

The effect of the structure of 5-(benzylthio)isoxazoles on selectivity of the synthesis of 5-(chlorosulfonyl)isoxazoles has been determined. The chemical behavior in relation to amines has been described.Aim. To develop the methods for the synthesis of 5-... see more

Features of 5-trichloromethyl-2-aryl-5,6-dihydro-[1,2,4]triazolo[1,5-c]quinazolines formation as result of [5+1]-cyclocondensation of the corresponding [2-(3-aryl-1H-1,2,4-triazole-5-yl)phenyl]amines with chloral hydrate are described in the article. It h... see more

Previously designated a comfortable and effective scheme of 3,7-disubstituted [1,2,4]triazolo[4,3-a]pyrazin-8(7H)-ones synthesis was spread to derivatives of ?-(7-aryl-8-oxo-7,8-dihydro[1,2,4]triazolo[4,3-a]pyrazin-3-yl) alkylcarboxylic acids. Our approac... see more

Alkylation of potassium 9-R1-10-R2-3-R-2-oxo-2?-[1,2,4]triazino[2,3 ?]quinazolin-6-thiolates by N-cycloalkyl-(cycloalkylaryl-)-2-chloracetamides and interaction of [(9-R1-10-R2-3-R-2-?xo-2H-[1,2,4]triazino[2,3-?]quinazolin-6-yl) thio]aceti? acids imidazol... see more

New 2-substituted-4-(5-phenyl-1H-tetrazol-1-yl)-2,3,5a,9a-tetrahydro-1H-1,5-benzodiazepine derivatives were synthesized by conventional as well as microwave method. Benzonitrile and sodium azide in the presence of ammonium chloride and DMF produces 5-phen... see more

Writing is language ability that very important for all human life. Writing helps someone to think easily and to express all idea, thought and feeling existing in mind in written form. The purpose of this research is to explore 5W+1H Questions in enhancin... see more

1 of 103.625 pages  |  10  records  |  more records»