Synthesis of Aldehyde Hydrazones Containing Pyridazinone
The reaction of 1,4,5,6-tetrahydro-6-pyridazinone-3-carboxylic acid hydrazides (1) and 1,6-dihydro-6-pyridazinone-3-carboxylic acid hydrazides (2) with four kind of substituted 3-formyl chromones (3a-3d) and five kind of 1-phenyl-3-aryl-4-formylpyrazoles (3e-3i) afforded the new compounds aldehyde hydrazones (4a-4i) and (5a-5i). Their structures were established by IR, 1H NMR and elemental analysis.
Qunjie Xu, Honghua Ge and Junxi Zhang
J. Tao "Synthesis of Aldehyde Hydrazones Containing Pyridazinone", Advanced Materials Research, Vols. 361-363, pp. 2008-2011, 2012