تفاعل #53607

معادلة التفاعل

methyl 3-nitro-benzoate

methyl chioroacetate

hydrochloric acid

potassium tert.butoxide

→

Methyl 4-methoxycarbonylmethyl-3-nitro-benzoate

المذيبات

dimethylformamide

water

dimethylformamide

ظروف التفاعل

المعالجة

1. 1
   workup.STIRRINGThe solution is stirred for 0.5 hours
2. 2
   أخرىthe precipitate obtained
3. 3
   ترشيحfiltered
4. 4
   غسيلwashed with water
5. 5
   أخرىThe product is recrystallised from 150 ml of methanol
6. 6
   أخرىdried in vacuo at 40° C

الإجراء التجريبي

54.3 g of methyl 3-nitro-benzoate and 29.0 g of methyl chioroacetate are dissolved in 100 ml of dimethylformamide and this solution is added dropwise at −10° C. to a solution of 78.5 g of potassium tert.butoxide in 500 ml of dimethylformamide. The mixture is stirred for another 10 minutes at ambient temperature and after this time the solution is poured onto 350 ml of concentrated hydrochloric acid in 2 l of iced water. The solution is stirred for 0.5 hours and the precipitate obtained is suction filtered and washed with water. The product is recrystallised from 150 ml of methanol and dried in vacuo at 40° C. Yield: 48.3 g (51% of theoretical), contains about 20% of methyl 6-methoxycarbonylmethyl-3-nitro-benzoate

المصدر