Chinese name: pepper propionaldehyde
English name: 2-Methyl-3-(3,4-methylenedioxyphenyl)propanal
Density: 1.2± 0.1g /cm3
Boiling point: 286.0±9.0 °C at 760 mmHg
Melting point: 94ºC
Molecular formula: C11H12O3
Molecular weight: 192.211
Flash point: 117.6±5.1 °C
Accurate mass: 192.078644
PSA: 35.53000
LogP: 2.24
Appearance: Slightly yellow liquid with a plant-like smell
Vapor pressure: 0.0±0.6 mmHg at 25°C
Refractive index: 1.538
Storage condition
Sealed storage, store in a cool, dry warehouse. Avoid light, heat, pay attention to avoid contact with iron.
stability
Avoid contact with incompatible materials. It reacts with a strong oxidant.
Light yellow liquid, with ozone aroma of flowers.
use
Used in cosmetics and detergents
The reaction temperature was 40℃ and the reaction time was 1.5h. The yield was 71.4%. In the second step, the optimum reaction conditions were determined by single factor method as follows: 100g of piperonyl propanaldehyde, 100g of methanol, 5g of 5% palladium-carbon catalyst, 300KPa absolute pressure of hydrogenation reactor, reaction temperature of 40℃, reaction time of 3h, yield of 93.1%Chemicalbook. The total yield of the two-step reaction was 66.5%. The structural products of the two-step reaction were characterized. Then we tried to synthesize the new jalal by one pot method, that is, the synthesis and hydrogenation of two steps were completed in a hydrogenation tank. The optimum reaction conditions were as follows: 100g of chloraldehyde, 100g of methanol, 40g of propanal, 5g of 5% palladium-carbon catalyst, 3g of potassium hydroxide, absolute pressure of 300KPa in hydrogenation reactor, reaction temperature of 40℃, reaction time of 3h, yield of 64.8%.
China
