Alpha-Methylcinnamaldehyde
is a versatile fragrance commonly used in the fragrance of cosmetics, soaps, foods, etc. The Alpha-methyl streptopropane obtained by the further reaction thereof is used as a synthetic essence and also has a very good aroma. At the same time, α-methylcinnamaldehyde is also an important intermediate for the synthesis of the therapeutic drug epalrestat. As the number of diabetic patients increases, the demand for the drug increases, and the demand for intermediates also increases, and there is an urgent need to improve the process to improve quality.
Production
The chemical name of alpha-methylcinnamic acid is alpha-methylphenylacrolein, which is an important fine chemical intermediate and is widely used in the production of pharmaceuticals, spices and other products. At present, there are several methods for preparing alpha-methylcinnamaldehyde. 1. Benzoaldehyde and n-propanal are used as raw materials, KF/A1203 is used as a catalyst, and polyethylene glycol is a phase transfer solution to synthesize ct-methyl cinnamaldehyde. The yield is 78.9. %. The yield of alpha-methylcinnamaldehyde synthesized by the method is high, and the process is relatively simple, but the preparation of the catalyst used is complicated, expensive, and has a little pollution to the environment, and the recycling process is cumbersome. 2, using benzaldehyde and n-propionaldehyde as raw materials, ethanol as solvent, PEG400, PEG600 for phase transfer synthesis of a-methyl cinnamaldehyde, the yield is 54.2%, the alpha-methyl cinnamaldehyde synthesized by this method has more negative reaction, product separation It is difficult to purify; 3, using benzaldehyde and n-propionaldehyde as raw materials, ethanol as solvent, TBAB as phase transfer catalyst, synthesizing a-methyl cinnamaldehyde under alkaline medium, the yield is 59.7%, the a-form synthesized by this method The synthesis process of cinnamaldehyde is simple, but the conversion rate of the raw material reaction is low, and the negative reaction is high, resulting in low product yield.
Summary of the invention
The object of the present invention is to provide a method for preparing alpha-methylcinnamaldehyde, which comprises synthesizing a-formaldehyde with benzaldehyde and n-propanal in an alkaline medium and using an aqueous solution of methanol as a solvent. The cinnamaldehyde has simple method, convenient operation, low raw material cost, high yield and no pollution to the environment, and is very suitable for industrial production.
在线联系供应商
Other supplier products
 |
Cinnamic Acid | |
 |
Isoamyl p-methoxycinnamate | What is ISOAMYL p-METHOXYCINNAMATE and where is it found? Isoamyl p-methoxycinnamate is a natural flavor and fragrances compound which is found in... |
|
|
Alpha-Methylcinnamaldehyde | is a versatile fragrance commonly used in the fragrance of cosmetics, soaps, foods, etc. The Alpha-methyl streptopropane obtained by the further r... |
 |
alpha-Methylcinnamic acid | English name: alpha-Methylcinnamic acidOther names: 2-Propenoic acid, 2-methyl-3-phenyl-; Cinnamic acid, α-methyl-; 2-Methyl-3-phenyl-2-prope... |
 |
Cinnamonitrile | Description: Cinnamonitrile is also known as styrene cyanide, is an excellent synthetic spice,it has a strong spicy aroma like cinnamon and floral... |
Same products
 |
Tween 80 Emulsifier | 卖方: VETTER Technology Co., Ltd | Chemical Name：Polysorbate 80/Polyoxyethylene (20) Sorbitan Monooleate Chemical Formula：C₆₄H₁₂₄O₂... |
 |
Span 85 Emulsifier | 卖方: VETTER Technology Co., Ltd | Span 85 emulsifierchemically known as Sorbitan Oleate, is a low-HLB, oil-soluble nonionic su... |
 |
Span 80 Emulsifier | 卖方: VETTER Technology Co., Ltd | Chemical Name:Sorbitan Monooleate Emulsifier System; Mixture of Emulsifier, Co-Emulsifier, and Em... |
 |
three jaw chuck | 卖方: 00000 | three jaw chuck Product Feature: This series of chuck comes with built-in cylinder struct... |
 |
PVC cazn stabiliizer for pipe GX-401 | 卖方: Shenzhou Lianfu Plastic-Rubber Tech. Co., Ltd | GX-401PVC Cazn stabilizeris a composite calcium-zinc stabilizer synthesized by our company using ... |
