反应详情

2,4-Dinitrophenyl tetrahydrofurfuryl ether of the formula II is reduced with alkali metal or ammonium hydrogen sulphide or polysulphide at pH values from 5 to 11, preferably from 9 to 11, and temperatures between room temperature and the boiling point of the reaction mixture, preferably between 60° and 90° C., mainly to give 2-amino-4-nitrophenyl tetrahydrofurfuryl ether of the formula III.