反应详情

A solution of 0.200 mole of p-(N-ethyl-N-2-hydroxyethylamino)benzenediazonium chloride (made as in the preceding procedure using twice the amount of PDA, sodium nitrite, hydrochloric acid and water) was added dropwise with stirring at 0°-5° C. to a solution of 15.9 g. (0.0994 mole) of 2,3-naphthalenediol, 400 ml. of pyridine and 150 ml. of aqueous 28% ammonia. The mixture was stirred for 11/2 hr. after completion of the addition. The solid was collected, washed with methanol and then water, and dried in vacuum at 45° C. to give 42.3 g. of green product, m.p. 240° C. Recrystallization from 400 ml. of pyridine gave 33.2 g. (61.6%) of green crystals, m.p. 247° C. (dec.),

1. additionwas added dropwise
2. stirringThe mixture was stirred for 11/2 hr
3. additionafter completion of the addition
4. customThe solid was collected
5. washwashed with methanol
6. dry with materialwater, and dried in vacuum at 45° C.
7. customto give 42.3 g
8. customRecrystallization from 400 ml
9. customof pyridine gave 33.2 g