نتایج جستجو برای: hydrazides
تعداد نتایج: 849 فیلتر نتایج به سال:
Under superacidic conditions, aniline and indole derivatives are sulfonylated at low temperature with easy-to-access arenesulfonic acids or arenesulfonyl hydrazides. By modification of the functional-group directing effect through protonation, this method allows nonclassical site functionalization by overcoming innate regioselectivity electrophilic aromatic substitution. This superacid-mediated...
In the title compound, C(8)H(8)N(4)O(5), the nitro groups ortho and para to the hydrazone group are twisted by 10.0 (2) and 3.6 (2)°, respectively, relative to the aromatic ring. The structure exhibits an intra-molecular N-H⋯O hydrogen bond between the hydrazide and ortho-nitro groups. There is a strong inter-molecular C=O⋯H-N hydrogen bond, giving rise to chains, and weaker ONO⋯NO(2) [2.944 (2...
In the reaction of hydrazide of thiophene-2-acetic acid (1) with isothiocyanates, the respective thiosemicarbazides 2a-g were obtained. Further cyclization with 2% NaOH led to formation of 4-substituted-3-(thiophene- 2-yl-methyl)-Delta2-1,2,4-triazoline-5-thiones (3a-g). These compounds showed promising antimycotic activity.
In the mol-ecular structure of the title hydrazide derivative, C(18)H(26)N(4)O(4), the conformations of the two units of 2-(2,2-dimethyl-1-oxoprop-yl)hydrazide substituents are not planar; these two units are attached axially to the benzene ring with C(ortho)-C-C(=O)-N torsion angles of 28.1 (2) and 31.0 (2)° [where C(ortho) is the C atom at position 4 of the benzene ring relative to the substi...
The combinatorial library of novel potential anticancer agents, namely, 2-(alkyl-, alkaryl-, aryl-, hetaryl-)[1,2,4]triazolo[1,5-c]quinazolines, was synthesized by the heterocyclization of the alkyl-, alkaryl-, aryl-, hetarylcarboxylic acid (3H-quinazoline-4-ylidene)hydrazides by oxidative heterocyclization of the 4-(arylidenehydrazino)quinazolines using bromine, and by the heterocyclization of...
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