반응 #43897

반응 방정식

campholenic aldehyde

propionaldehyde

→

2-methyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl)-but-2-en-1-al

수율 94.9%

반응 조건

후처리

1. 1
   기타A 500 mL four-necked flask equipped with a stirrer
2. 2
   온도cooled
3. 3
   기타to remove amines
4. 4
   기타separating the mixture into two layers
5. 5
   세척The thus separated organic layer was washed with water
6. 6
   기타separated into two layers

실험 절차

A 500 mL four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a dropping funnel was charged with 171 g (0.98 mol) of campholenic aldehyde (purity: 88%), 3.8 g (0.045 mol) of piperidine and 13.1 g (0.046 mol) of stearic acid, and the contents in the flask were stirred while heating at 100° C. Then, 91 g (1.6 mol) of propionaldehyde was gradually dropped into the flask for 6 h, and the resultant mixture was aged for 1 h and then cooled. Thereafter, 3.2 g (0.053 mol) of acetic acid was added to the mixture to remove amines therefrom, thereby separating the mixture into two layers. The thus separated organic layer was washed with water and separated into two layers, thereby obtaining 295 g (0.93 mol) of 2-methyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl)-but-2-en-1-al (purity as measured by gas chromatography: 60.6%) (yield based on theoretical amount: 95%).

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