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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Synthesis, Spectroscopic Characterization, Crystal Structures and Antibacterial Activity of Benzohydrazones Derived
Yi-Xuan Zhou1, Wei Li2, Zhonglu You3
1The Second Hospital of Dalian Medical University. qingzhu_jiao@126.com.
None:
Reaction of 4-pyridinecarboxaldehyde with 3-hydroxy-4-methoxybenzohydrazide, 4-bromobenzohydrazide and 4-dimethylaminobenzohydrazide, respectively in methanol afforded three new benzohydrazones. They are 3-hydroxy-4-methoxy-N'-(pyridin-4-ylmethylene)benzohydrazide (1), 4-bromo-N'-(pyridin-4-ylmethylene)benzohydrazide (2), and 4-(dimethylamino)-N'-(pyridin-4-ylmethylene)benzohydrazide (3). The compounds have been characterized by elemental analysis, 1H and 13C NMR and IR spectroscopy, as well as single crystal X-ray diffraction. The antibacterial activities of the compounds against E. coli, P. aeruginosa, B. subtilis, and S. aureus were investigated and gave interesting results.
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