反应 #4143

反应方程式

N-methylpiperazine

1-(2-aminophenyl)-1,2,3,4-tetrahydroquinoline

triethylamine

maleic acid

N-methyl-piperazine

phenylchloroformate

→

product

收率 65.4%

4-Methyl-N-[2-(1,2,3,4-tetrahydro-1-quinolinyl)phenyl]piperazinecarboxamide maleate

收率 65.4%

溶剂

dichloromethane

ethanol

Water

反应条件

后处理

1. 1
   其他the reaction temperature below 5° C
2. 2
   workup.ADDITIONThe addition
3. 3
   workup.STIRRINGThe solution was stirred for 2 hours
4. 4
   workup.STIRRINGthe solution was stirred overnight
5. 5
   其他The layers were separated
6. 6
   洗涤the organic phase was washed twice with water
7. 7
   干燥dried over anhydrous sodium sulfate
8. 8
   浓缩concentrated in vacuo
9. 9
   workup.DISSOLUTIONThe residue was dissolved in ethanol (100 ml)
10. 10
    其他The precipitate was collected

实验过程

A stirred solution, under nitrogen of 1-(2-aminophenyl)-1,2,3,4-tetrahydroquinoline (4.50 g, 0.020 mole), and triethylamine (3.04 g, 0.030 mole) in dichloromethane (50 ml) was cooled to 0° C. and phenylchloroformate (4.70 g, 0.030 mole) was added dropwise at such a rate such as to keep the reaction temperature below 5° C. The addition took 10 minutes. The mixture was stirred for 1 hour at ice-bath temperature, 1 hour at room temperature, and N-methylpiperazine (8.02 g, 0.080 mole) was added dropwise over a 5 minute period. The solution was stirred for 2 hours, N-methyl-piperazine (4.01 g, 0.040 mole) was added and the solution was stirred overnight. Water (100 ml) was added with vigorous stirring. The layers were separated, and the organic phase was washed twice with water, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was dissolved in ethanol (100 ml) and treated with a warm solution of maleic acid (2.6 g 0.022 mole) in ethanol (15 ml). The precipitate was collected to provide 6.1 g (65%) of product. Recrystallization from methanol afforded the analytical sample, mp 171°-173° C. dec.

来源