تفاعل #92860

معادلة التفاعل

2-(4-benzyloxyphenoxy)-3-methylquinoxaline

water

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product

المردود 50.7%

2-(4-Hydroxyphenoxy)-3-methylquinoxaline

المردود 50.7%

المذيبات

methylene chloride

methylene chloride

methylene chloride

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONWhen the addition
2. 2
   أخرى(2 hours)
3. 3
   أخرىto room temperature
4. 4
   workup.STIRRINGThe mixture was stirred vigorously for 40 minutes
5. 5
   ترشيحthe insoluble solid was filtered
6. 6
   أخرىCrystallization from an ethanol-water mixture (1:1)

الإجراء التجريبي

A solution of 12.5 g (0.05 mole) borontribromide in 100 cc methylene chloride was added, over a period of 40 minutes, to a well stirred, cold (-62° C.) solution of 17.1 g 2-(4-benzyloxyphenoxy)-3-methylquinoxaline (0.05 mole) in 400 cc methylene chloride. When the addition was complete, the temperature of the reaction was allowed to rise slowly (2 hours) to room temperature. The reaction mixture was then poured into 1 liter of water and an additional 500 cc of methylene chloride was added. The mixture was stirred vigorously for 40 minutes and the insoluble solid was filtered. Crystallization from an ethanol-water mixture (1:1) gave 6.4 g of product, m.p. 175°-178° C.

المصدر