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 BUPIRIMATE
41483-43-6

BUPIRIMATE synthesis

1synthesis methods
-

Yield:41483-43-6 94%

Reaction Conditions:

with 18-crown-6 ether;potassium carbonate in water;ethyl acetate for 2 h;Reflux;Reagent/catalyst;Solvent;

Steps:

1-10 Example 4
Put 20.9g of ethirimol,15.2g potassium carbonate, 180ml ethyl acetate, 0.018ml water, 0.2% 18-crown-6 were added to the reaction flask in sequence, heated to 50 with stirring, and 17.3g N,N-dimethylsulfonyl chloride was slowly added dropwise. After completion, the temperature was raised to reflux reaction for 2 hours, when the remaining 40% of the raw material was detected, hexamethylenetetramine was added to control the pH of the system to be 10, and the reaction was continued for 4 hours until the end. Then the system is cooled to 50°C, washed with water to adjust the system to neutrality, the water phase is separated, and the solvent is removed to obtain an oily substance. The solid is precipitated at a low temperature to 10°C, dried and weighed 29.7g, which is ethimphenol sulfonate , The yield is 94%, and the content is 97%.

References:

Xi'an Modern Chemical Institute;Wang Wei;Wang Lieping;Liu Kangyun;Huang Xiaoying;Zheng Xiaorui;Ning Binke;Xue Chao CN111303050, 2020, A Location in patent:Paragraph 0028-0050

FullText

BUPIRIMATE Related Search:

公主岭市| 上高县| 中山市| 牙克石市| 二连浩特市| 巍山| 巴里| 株洲市| 璧山县| 芜湖市| 大兴区| 绍兴市| 景洪市| 霸州市| 兴海县| 霸州市| 清镇市| 深州市| 固镇县| 瓮安县| 平潭县| 理塘县| 革吉县| 泗水县| 城固县| 库车县| 新乐市| 河源市| 阿克| 宜黄县| 周口市| 易门县| 陕西省| 白银市| 滕州市| 广平县| 富川| 增城市| 许昌市| 东山县| 马公市|