一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
010-86108875
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List Vanillylacetone
122-48-5

Vanillylacetone synthesis

9synthesis methods
By condensation of vanillin with acetone followed by hydrogenation.
-

Yield:122-48-5 87%

Reaction Conditions:

with palladium on activated charcoal;hydrogen;acetic acid in ethanol at 20; under 760.051 Torr;

Steps:

1

38.44 g of 4-(4-hydroxy-3-methoxyphenyl)-3-ene-2-butanone was dissolved in 500 mL of ethanol.Add 500 mL of acetic acid with stirring, and add 1.92 g of Pd/C.After the hydrogen balloon was placed, the gas was exchanged three times, and after reacting at room temperature for 1 hour,Filtration, the filtrate was evaporated to ethanol, water was added, and then extracted with ethyl acetate.The liquid phase was separated, and the organic phase was washed with a saturated NaHCO 3 solution and water, respectively.The solvent is removed by pressure reduction and separated by column chromatography.Obtained a colorless liquid of 31.07g,The yield was 87%.

References:

CN108191625,2018,A Location in patent:Paragraph 0029; 0034; 0036

Vanillylacetone Related Search:

临猗县| 西峡县| 准格尔旗| 谷城县| 莱芜市| 彰武县| 延长县| 溆浦县| 文化| 巴青县| 怀远县| 荔浦县| 湾仔区| 浦江县| 罗山县| 红原县| 石台县| 蒙阴县| 静乐县| 镇安县| 民丰县| 甘孜县| 长治市| 永胜县| 常宁市| 犍为县| 五大连池市| 平顺县| 通化县| 德清县| 吴忠市| 娱乐| 米泉市| 阿巴嘎旗| 京山县| 峨山| 彭阳县| 兴海县| 建水县| 灵璧县| 密云县|