Furfuraldehyde 5-nitro

The bacteriodde nitrofurazone (23) is an imide made from available semicarbazide (24) and aldehyde (25). The nitro group is in an a-position so C-N disconnection to very cheap furfuraldehyde (24) is good. 

I 5-Nitro-2-furfuraldehyde semicarbazone (nitrofurazone, nitrofura], NF-7, Furacin, Sanfuran). 

From the urine of animals fed with 5-nitro-2-furfuraldehyde acetylhydra-zone(nihydrazone) (/) two end products were isolated and characterized as 5-acetamido-2-furfuraldehyde acetylhydrazone (K) and 1,2-diacetyl-hydrazine. The presence of 5-amino-2-furfuraldehyde acetylhydrazone (J), 5-diacetylamino-2-furfuraldehyde acetylhydrazone (L), and 5-nitrofuroic acid (G) was demonstrated in the urine of the animals. 

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