تفاعل #515330

معادلة التفاعل

2,3-dihydro-1,4-benzodioxin-6-yl acetate

sodium hydroxide

AcOEt

→

2,3-Dihydro-1,4-benzodioxin-6-ol

المذيبات

methanol

ظروف التفاعل

المعالجة

1. 1
   أخرىAt the end of the reaction
2. 2
   أخرىthe methanol is evaporated
3. 3
   غسيلwashed with ethyl acetate
4. 4
   استخلاصAfter extraction
5. 5
   تجفيفdrying over MgSO4
6. 6
   تركيزthe product is concentrated in vacuo
7. 7
   أخرىPurification on a silica column
8. 8
   أخرىto be obtained (eluant

الإجراء التجريبي

1 g of 2,3-dihydro-1,4-benzodioxin-6-yl acetate (5.149 mmol) is dissolved in a solution of methanol (7.5 ml) and, under an argon atmosphere, the mixture is made basic, dropwise, with a 10% sodium hydroxide solution. The mixture is stirred at ambient temperature for 4 hours. At the end of the reaction, the methanol is evaporated and the reaction medium is acidified (to pH=1) with a 2N HCl solution and then washed with ethyl acetate. After extraction, drying over MgSO4 is carried out and the product is concentrated in vacuo. Purification on a silica column allows an oil to be obtained (eluant:PE/AcOEt 8/2 then 7/3).

المصدر