Реакция #43899

Уравнение реакции

n-undecanal

formaldehyde

dibutyl amine

stearic acid

n-undecanal

→

α-methylene undecanal

Условия реакции

Обработка

1. 1
   ДругоеA 3 L four-necked flask equipped with a stirrer
2. 2
   ДругоеAfter the elapse of 30 min. it
3. 3
   Температураthe mixture was cooled
4. 4
   Другоеseparated into two layers
5. 5
   workup.DISTILLATIONThe thus separated organic layer was subjected to distillation treatment

Методика

A 3 L four-necked flask equipped with a stirrer, a thermometer and a reflux condenser was charged with 1043 g (6.0 mol) of n-undecanal, 520 g (6.4 mol) of a 37% by mass formaldehyde aqueous solution, 47 g (0.36 mol) of dibutyl amine and 33 g (0.11 mol) of stearic acid, and the contents in the flask were stirred while heating at 95° C. After the elapse of 30 min. it was confirmed that no n-undecanal was present in the raw mixture, and then the mixture was cooled and separated into two layers. The thus separated organic layer was subjected to distillation treatment, thereby obtaining 1062 g (5.7 mol) of α-methylene undecanal (purity as measured by gas chromatography: 97%) (yield based on theoretical amount: 95%).

Источник