2-Ethylacrylaldehyde synthesis
- Product Name:2-Ethylacrylaldehyde
- CAS Number:922-63-4
- Molecular formula:C5H8O
- Molecular Weight:84.12
Yield:922-63-4 94.5%
Reaction Conditions:
with tris(pentafluorophenyl)borate;dibutylamine at 40 - 60; for 2 h;Time;
Steps:
1-4 Example four:
The reaction requires 144 g of n-butyraldehyde and 72 g of paraformaldehyde.Di-n-butylamine 28.8g and 14.4g B(C6F5)3,The molar ratio of n-butyraldehyde to formaldehyde is 1:1.2.Control 40-60 ° C,Add a mixture of di-n-butylamine and B(C6F5)3,The reaction was allowed to stand at 40-60 ° C for 2 h and then allowed to stand for stratification.The organic layer is added with 0.2% equivalent of hydroquinone.Distillation gave 2-ethyl acrolein to the hydroquinone in 0.2% equivalents. Synthetic method is as follows:(1) Add n-butyraldehyde and paraformaldehyde (2) to a 500 mL reaction flask, and add a mixture of di-n-butylamine and B(C6F5)3.Temperature control at 40-60 ° C(3) After the addition is completed, the temperature is stirred at 40-60 ° C for 2 hours.Sampling analysis of 2-ethyl acrolein, 2,2-hydroxymethylbutanal and 2,2-hydroxymethylbutanol were: 97.4%, 1.6% and 1.0%,Static stratification (4) organic layer added to benzeneDiphenol 0.2%Equivalent distillation to obtain colorless liquid 2-ethyl acrolein 158.7g0.2% equivalent of hydroquinone was added, the GC content was 99.8%, and the yield was 94.5%.
References:
CN109096074,2018,A Location in patent:Paragraph 0013-0020
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