(2) Under stirring, the 2.5% sodium amalgam is slowly added to the mixture of cinnamic acid and sodium hydroxide solution, and cinnamic acid is reduced to phenylpropionic acid by the generated new hydrogen. Acidification of the reaction mixture hydrochloric acid, phenylpropionic acid is precipitated...
英语翻译在反应瓶中加入2-Hydroxy-3-methoxy-3,3-diphenylpropanoic acid,并加入Methanol和Tosic acid,室温下搅拌0.5小时,然后加热回流,并滴加氢氧化钠溶液适量,滴加完毕后不断搅拌反应1小时.争取反应体系中的甲醇,用浓盐酸溶液调节体系品pH2.0左右,室温放置10小时,体系有白色沉淀物生成,过滤,得产品. 答案 Add 2...
The present invention provides a process for the preparation of substantially racemic 2-{[2-(4-hydroxyphenyl)ethyl]thio}-3-[4-(2-{4-[(methylsulfonyl)oxy]phenoxy}ethyl)phenyl]-propanoic acid which comprises reacting 2-{[2-(4-hydroxyphenyl)ethyl]thio}-3-[4-(2-{4-[(methylsulfonyl)oxy]phen...
3-Mercaptopropionic acid has been synthesized from 3-chloropropionic acid and the factors which may affect the reaction have been investigated. 本文以3-氯丙酸为原料合成得到3-巯基丙酸,对影响反应的因素做了探讨。 2. Anion surfactant-lignin alcohol ether carboxylate was synthesized from lignin alcohol ...
3-Mercaptopropionic acid has been synthesized from 3-chloropropionic acid and the factors which may affect the reaction have been investigated. 本文以3-氯丙酸为原料合成得到3-巯基丙酸,对影响反应的因素做了探讨。 2. Anion surfactant-lignin alcohol ether carboxylate was synthesized from lignin alcohol ...
First, a mixed anhydride (MA) forms in situ as a key intermediate from the reaction of pivalic anhydride (Piv2O) with the racemic -fluoro-2-phenylpropanoic acid [(±)-CO2H] via generation of zwitterion (int-I) through steps A and B by promotion of acyl-transfer catalyst, (+)-...