Réaction #1702075

Équation de réaction

sodium borohydride

2-bromo-5-methoxybenzaldehyde

cyclopropylamine

toluene

→

crude product

N-(2-bromo-5-methoxybenzyl)cyclopropanamine

Solvants

water

methanol

dichloromethane

Conditions de réaction

Traitement

1. 1
   AutreIn a flask fitted with a Dean-Stark trap
2. 2
   Températureat reflux for 4 hours
3. 3
   ConcentrationThe solution was then concentrated
4. 4
   Autreto give a yellow oil to which
5. 5
   TempératureThe reaction mixture was cooled on icebath
6. 6
   workup.ADDITIONAfter complete addition
7. 7
   workup.STIRRINGthe reaction mixture was stirred 2 hours at room temperature

Mode opératoire

In a flask fitted with a Dean-Stark trap was introduced 2-bromo-5-methoxybenzaldehyde (5.68 g, 26.41 mmol), cyclopropylamine (3.02 g, 52.83 mmol) and toluene (70 ml). The reaction mixture was stirred at room temperature for 1 hour and then at reflux for 4 hours. The solution was then concentrated to give a yellow oil to which was added methanol (30 ml). The reaction mixture was cooled on icebath followed by portionwise addition of sodium borohydride (2.00 g, 52.83 mmol). After complete addition, the reaction mixture was stirred 2 hours at room temperature, and then water (70 ml) was added. The crude product was isolated by extraction with dichloromethane and the combined organic phases were dried over sodium sulfate, filtered, and finally evaporated under reduced pressure.

Source