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5-Nitrofurfural Diacetate
Cas No:92-55-7
Molecular formula:C9H9NO7
Molecular weight:243
Annual production:300 tons
Structural formula:
Product name:5-Nitro-2-furaldehydediacetate
Description of properties: very light yellow crystalline powder.
CAS: 92-55-7
Molecular weight: 243.17
Molecular formula: C9H9NO7
Content: ≥98.5%
Melting point: 89-93°C
Standard: Enterprise Standard
Production method:
It is obtained by nitrification and esterification of furfural. Add acetic anhydride to the reaction pot, cool to -5 ° C, add 1/5 of the mixed acid (nitric acid and sulfuric acid), and then add a mixture of nitric acid and furfural (1:2 by volume) at the same time to control the temperature. After about 0 °C, about 5-6h is added, and a part of furfural is continuously added dropwise. Then, stirring for 1 h, adding water and sodium carbonate solution, heating to 55-62 ° C, and keeping warm for 1 h. Cool to 15 ° C, filter, wash with water, dry to obtain the finished product, the yield of 85%.
Uses: Used as pharmaceutical intermediates, used in the manufacture of furan anti-infectives such as furazolidone, nitrofurazone, furadantin, nitrovin, nifuroxazide, veterinary raw materials, flavors, etc.
