تفاعل #90302

معادلة التفاعل

pyridine

4-(3-(2,5-dichloro-4,6-dimethylpyridin-3-yl)-1,2,4-oxadiazol-5-yl)-2-methoxy-6-nitrophenol

HCl

aluminium chloride

→

5-[3-(2,5-dichloro-4,6-dimethylpyridin-3-yl)-[1,2,4]oxadiazol-5-yl]-3-nitrobenzene-1,2-diol

المردود 81.1%

المذيبات

NMP

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةIt was cooled to room temperature
2. 2
   ترشيحThe precipitate was filtered off
3. 3
   غسيلwashed with water to and
4. 4
   أخرىdried under vacuum
5. 5
   أخرىRecrystallization from acetic acid

الإجراء التجريبي

To an ice-cooled solution of 4-(3-(2,5-dichloro-4,6-dimethylpyridin-3-yl)-1,2,4-oxadiazol-5-yl)-2-methoxy-6-nitrophenol (2.40 g, 5.84 mmol) in NMP (19 mL) was added aluminium chloride (0.977 g, 7.33 mmol) followed by addition of pyridine (1.93 mL). The reaction mixture was heated to 60° C. for 1 hour. It was cooled to room temperature and poured into 2 N HCl-solution (ca. 40 mL). The precipitate was filtered off, washed with water to and dried under vacuum. Recrystallization from acetic acid yielded 1.88 g (81%) of 5-[3-(2,5-dichloro-4,6-dimethylpyridin-3-yl)-[1,2,4]oxadiazol-5-yl]-3-nitrobenzene-1,2-diol.

المصدر