A simple and efficient method has been developed for the synthesis of various 2-quinoxalinone-3-hydrazone derivatives using microwave irradiation technique. The series of 2-quinoxalinone-3-hydrazone derivatives synthesized, were structurally confirmed by analytical and spectral data and evaluated for their antimicrobial activities. The results showed that this skeletal framework exhibited marke...

The reactivity of different diazoalkane reagents was examined using the coupling reaction with methyl β-Dglucopyranosiduronic acid as a model. 9H-Fluoren-2-yl-diazomethane (FDAM), prepared from its precursor 9H-fluoren2-carbaldehyde hydrazone by MnO2 oxidation, was found suitable as a new labeling agent for carboxyl groups in carbohydrate materials. The reaction with methyl β-D-glucopyranosidur...

In the title compound, C(15)H(12)I(2)N(2)O(4)·CH(3)OH, the hydrazone mol-ecule exists in an E conformation with respect to the C=N bond. The dihedral angle between the rings is 11.9 (2)°. There is one intra-molecular O-H⋯N hydrogen bond in the hydrazone mol-ecule. In the crystal, the hydrazone and methanol mol-ecules are linked through O-H⋯O and N-H⋯O hydrogen bonds and C-H⋯O inter-actions to f...

In the title compound, [Cu2(C11H13N3O3S)2(C2H6OS)2], the Cu(II) cation is N,N',O-chelated by a deprotonated hy-droxy-imino-tosyl-hydrazone ligand and coordinated by a dimethyl sulfoxide mol-ecule. One O atom from the adjacent hy-droxy-imino-tosyl-hydrazone ligand bridges the Cu(II) cation, forming the centrosymmetric dimeric complex. The cation is in an overall distorted N2O3 square-pyramidal c...