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 Aspartame
22839-47-0

Aspartame synthesis

10synthesis methods
By coupling the amino acids L-phenylalanine and L-aspartic acid, and the esterification of the carboxyl group of the phenylalanine moiety to produce the methyl ester. This esterification can occur before or after coupling. The crystallized slurry is centrifuged and the resulting “wet-cake” is washed to remove impurities.
33605-76-4 Synthesis
FOR-ASP-PHE-OME

33605-76-4
14 suppliers
inquiry

-

Yield:22839-47-0 83%

Reaction Conditions:

with hydroxylamine hydrochloride in methanol;

Steps:

5 EXAMPLE 5

EXAMPLE 5 1.6 g N-Formyl-α-L-aspartyl-L-phenylalanine methyl ester (5 millimole) and 1.74 g hydroxylamine hydrochloride (25 millimole) were dissolved in 8 ml methanol, and the solution was stirred ten hours at 50° C. It then contained α-L-aspartyl-L-phenylalanine methyl ester in a yield of 83%.

References:

US4021418,1977,A

Aspartame Related Search:

平顺县| 建昌县| 酉阳| 上高县| 三河市| 五常市| 香格里拉县| 庆云县| 永新县| 修水县| 朝阳区| 水富县| 大邑县| 措勤县| 泸定县| 上饶市| 米林县| 甘谷县| 荃湾区| 调兵山市| 隆回县| 长岛县| 漯河市| 海宁市| 远安县| 吴川市| 大庆市| 石家庄市| 沛县| 榕江县| 腾冲县| 河池市| 九龙坡区| 银川市| 红原县| 荥经县| 池州市| 壤塘县| 万年县| 米林县| 浙江省|