反应详情

In the typical procedure, 0.1 mole of benzofurazan 1-oxide and 0.12 mole of nitroethane is dissolved at 100 ml. of tetrahydrofuran. To this mixture there is added at room temperature, 0.12 mole of diethylamine over a period of 0.5 hour. An instantaneous exothermic reaction is observed (40° C.) and within one hour, the product crystallizes from the solution. The solution is allowed to stand overnight at room temperature and filtered to yield 9.6 grams of 2-methyl-1-hydroxy-1-H-benzimidazole 3-oxide (Table III, Example H-77). The product can be recrystallized from methanol.

1. additionTo this mixture there is added at room temperature
2. customAn instantaneous exothermic reaction
3. custom(40° C.)
4. customthe product crystallizes from the solution
5. waitto stand overnight at room temperature
6. filtrationfiltered