反応 #366037

反応方程式

2-propoxybenzonitrile

ammonium chloride

triethylaluminium

chloroform

→

2-Propoxybenzamidine hydrochloride

溶媒

toluene

hexane

反応条件

後処理

1. 1
   workup.STIRRINGthe reaction mixture is stirred at 80° C. (bath) overnight
2. 2
   温度With ice-cooling
3. 3
   その他the cooled reaction mixture
4. 4
   workup.ADDITIONis added to a suspension of 300 g of silica gel and 2.85 of ice-
5. 5
   workup.STIRRINGthe mixture is stirred for 30 minutes
6. 6
   ろ過The mixture is filtered off with suction
7. 7
   洗浄the filter residue is washed with the same amount of methanol
8. 8
   workup.DISTILLATIONThe solvent is distilled off under reduced pressure
9. 9
   workup.STIRRINGthe residue is stirred with 500 ml of a mixture of dichloromethane and methanol (9:1)
10. 10
    ろ過the solid is filtered off
11. 11
    濃縮the mother liquor is concentrated
12. 12
    workup.STIRRINGThe residue is stirred with petroleum ether
13. 13
    ろ過filtered off with suction

実験手順

21.41 g (400 mmol) of ammonium chloride are suspended in 400 ml of toluene and cooled to 0-5° C. 200 ml of a 2M solution of triethylaluminium in hexane are added dropwise, and the mixture is stirred at room temperature until the evolution of gas has ceased. After addition of 32.2 g (200 mmol) of 2-propoxybenzonitrile, the reaction mixture is stirred at 80° C. (bath) overnight. With ice-cooling, the cooled reaction mixture is added to a suspension of 300 g of silica gel and 2.85 of ice-cooled chloroform, and the mixture is stirred for 30 minutes. The mixture is filtered off with suction and the filter residue is washed with the same amount of methanol. The solvent is distilled off under reduced pressure, the residue is stirred with 500 ml of a mixture of dichloromethane and methanol (9:1), the solid is filtered off and the mother liquor is concentrated. The residue is stirred with petroleum ether and filtered off with suction. This gives 22.3 g (52%) of product.

出典