One-step preparation of 4,6-dinitroresorcinol from resorcinol
 4,6-Dinitroresorcinol is prepared by reacting resorcinol with concentrated nitric acid that is substantially free of suboxides of nitric acid. It has been found that greater than 60 percent yields of the desired product can be obtained when the concentration of aqueous nitric acid used is between about 80 and about 93 weight percent, and the concentration of suboxides is less than about 2 weight percent based on the weight of nitric acid. 
The Dow Chemical Company
C
C07C
inventional
George J. William J. John W. Zenon
Frycek Kruper Hull, Jr. Lysenko