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 2-Chloropropionic acid
598-78-7

2-Chloropropionic acid synthesis

12synthesis methods
-

Yield:-

Reaction Conditions:

Stage #1:L-Lactic acid with thionyl chloride
Stage #2:Alkaline conditions;

Steps:

3 Comparative Example 3 Refinement of Alanylglutamine (Ammonia Used as Amination Reagent)
Alanylglutamine is prepared according to CN1786019A. Wherein, esterified L-lactic acid reacts with thionyl chloride in the presence of a catalyst to give 2-chloropropionate; 2-chloropropionate is hydrolyzed with basic solution to give 2-chloropropionic acid; 2-chloropropionic acid reacts with a chlorinating reagent to give 2-chloropropionic chloride; 2-chloropropionic chloride reacts with L-glutamine to provide N-(2-chloro)-propionyl-glutamine; N-(2-chloro)-propionyl-glutamine reacts with aqueous ammonia to generate alanylglutamine crude product. However, the reaction solution contains salt impurities such as ammonium chloride, which causes difficulties in subsequent purification processes.

References:

HAINAN LINGKANG PHARMACEUTICAL CO., LTD.;Tao, Linggang US2015/38740, 2015, A1 Location in patent:Paragraph 0076

2-Chloropropionic acid Related Search:

咸宁市| 镇原县| 扎兰屯市| 元阳县| 泽库县| 山西省| 商南县| 肇州县| 许昌市| 安陆市| 贵阳市| 武冈市| 新昌县| 新宁县| 阳城县| 陈巴尔虎旗| 宽城| 壤塘县| 竹山县| 河间市| 阿城市| 华宁县| 张家港市| 家居| 犍为县| 明水县| 商南县| 台东市| 曲阜市| 隆子县| 安塞县| 利津县| 沾益县| 紫阳县| 喀喇沁旗| 秦安县| 得荣县| 小金县| 蒙山县| 林州市| 定西市|