反应详情

4-Piperidinodibenzofuran-1,2-dione (18.4; 0.062 mol) was added in one portion to a vigorously stirred solution of hydroxylamine hydrochloride (22.9 g; 0.33 mol) and piperidine (28 g; 0.33 mol) in methanol (230 ml) at room temperature. After 1.75 hours the mixture was filtered and the resulting solid washed with water and dried to yield 2-hydroxy-1-nitroso-4-piperidinodibenzofuran as a red-brown solid (3.48 g; 19%), m.pt. 181°-185° C. (decomp 207° C.). ##STR12##

1. filtrationAfter 1.75 hours the mixture was filtered
2. washthe resulting solid washed with water
3. customdried