反応 #53607

反応方程式

methyl 3-nitro-benzoate

methyl chioroacetate

hydrochloric acid

potassium tert.butoxide

→

Methyl 4-methoxycarbonylmethyl-3-nitro-benzoate

溶媒

dimethylformamide

water

dimethylformamide

反応条件

後処理

1. 1
   workup.STIRRINGThe solution is stirred for 0.5 hours
2. 2
   その他the precipitate obtained
3. 3
   ろ過filtered
4. 4
   洗浄washed with water
5. 5
   その他The product is recrystallised from 150 ml of methanol
6. 6
   その他dried in vacuo at 40° C

実験手順

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

出典