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 N-VINYLFORMAMIDE
13162-05-5

N-VINYLFORMAMIDE synthesis

6synthesis methods
-

Yield:13162-05-5 75.8%

Reaction Conditions:

with acetic anhydride at 35 - 60; for 13.5 h;Inert atmosphere;Time;

Steps:

1; 1
Take 45g (1.0mol) of formamide, add 0.9g of composite basic catalyst (including 0.7g of potassium carbonate and 0.2g of triethylamine). After deoxygenating by nitrogen, the temperature is reduced to 10, and then 150g (3.4mol) of acetaldehyde is added dropwise , Reacted at 10 for 3h to obtain hydroxyethyl formamide. Then add 153g (1.5mol) of acetic anhydride, under the protection of nitrogen, continue to react for 10h in a closed reaction flask at a reaction temperature of 35 to obtain ester compounds. The ester compounds are cracked at 60 for 3.5h to obtain N- The mixture of vinylformamide is rectified under reduced pressure at 100-150Pa to obtain N-vinylformamide. After testing, the yield of N-vinylformamide was 75.8% and the purity was 96.2%.

References:

Chinese Academy Of Sciences Changchun Applied Chemistry Institute;Wang Pixin;Tan Ying;Xu Kun;Chi Hui;Bai Yungang;Zhang Wende CN112047854, 2020, A Location in patent:Paragraph 0065-0066; 0071-0072

FullText

N-VINYLFORMAMIDE Related Search:

武宁县| 南通市| 宁远县| 卢湾区| 安溪县| 平远县| 抚宁县| 阿拉善右旗| 怀来县| 彭阳县| 襄汾县| 塔城市| 大城县| 永嘉县| 光泽县| 高密市| 额济纳旗| 清水河县| 伊吾县| 青岛市| 肥乡县| 宁明县| 阳山县| 钦州市| 开平市| 孝感市| 开封县| 岐山县| 乐陵市| 含山县| 友谊县| 河曲县| 乌恰县| 闽清县| 临漳县| 郓城县| 武乡县| 英山县| 延吉市| 六枝特区| 兴山县|