Crotonic acid benzyl ester synthesis
- Product Name:Crotonic acid benzyl ester
- CAS Number:71338-71-1
- Molecular formula:C11H12O2
- Molecular Weight:176.21
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Yield:71338-71-1 1703 g
Reaction Conditions:
Stage #1: (E)-but-2-enoic acid;benzyl alcohol in cyclohexane; for 0.166667 h;Large scale;
Stage #2: with toluene-4-sulfonic acid in cyclohexane at 80; for 6 h;Large scale;
Steps:
1-3
860g trans-2-butenoic acid, 1050g phenethyl alcohol and 3L cyclohexane were sequentially added to a 10L reaction kettle. After stirring for 10 minutes, 17.2 g of p-toluenesulfonic acid was added, and then the temperature was raised to 80° C., and the reaction was carried out for 6 hours. Distill under reduced pressure at 400 Pa, and collect the fractions with the mother liquor temperature between 98°C and 101°C,That is, 1703 g of trans-2-butenoic acid phenethyl ester with a purity of 98.8% was obtained.
References:
CN112645819,2021,A Location in patent:Paragraph 0074-0086; 0088-0091; 0093-0096
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