تفاعل #2254244

معادلة التفاعل

1,4-bis(3-aminopropyl)piperazine

2-ethylbutyraldehyde

water

NaBH4

→

1,4-bis{3-[N-(2-ethylbutyl)amino]propyl}piperazine

المذيبات

ethanol

ethanol

ظروف التفاعل

المعالجة

1. 1
   workup.STIRRINGthe mixture was stirred for 12 h at room temperature
2. 2
   أخرىwas removed under reduced pressure
3. 3
   استخلاصThe aqueous residue was extracted with CH2Cl2 (3×30 mL)
4. 4
   استخلاصCombined organic layers were extracted with HCl 1M
5. 5
   استخلاصextracted with CH2Cl2
6. 6
   تجفيفCombined organic layers were dried over MgSO4
7. 7
   أخرىCrude compound is purified by flash chromatography on neutral aluminium oxide (CH2Cl2/MeOH)

الإجراء التجريبي

To a solution of 1,4-bis(3-aminopropyl)piperazine (0.51 mL, 2.5 mmol) and 2-ethylbutyraldehyde (645 μL, 5.24 mmol) in absolute ethanol (20 mL), 3 Å molecular sieves are added. After stirring the mixture at room temperature for 12 h, NaBH4 (1.9 g, 49.92 mmol) was added portionwise and the mixture was stirred for 12 h at room temperature. The reaction was quentched by dropwise addition of water (20 mL) and ethanol was removed under reduced pressure. The aqueous residue was extracted with CH2Cl2 (3×30 mL). Combined organic layers were extracted with HCl 1M. The combined aqueous layers were neutralized with NaOH 1M and extracted with CH2Cl2. Combined organic layers were dried over MgSO4. Crude compound is purified by flash chromatography on neutral aluminium oxide (CH2Cl2/MeOH).

المصدر