Study on synthesis of amino acid methyl ester hydrochlorides in a methanol solution of thionyl chloride;
二氯亚砜-甲醇溶液中合成氨基酸甲酯盐酸盐的研究
Using piperidine-4-carboxylic acid and ethanol as raw material, 4-ethyl formate piperidine was synthesized through esterification reaction with thionyl chloride and trimethylchlorosilane respectively, the yield was 85.
以4-哌啶甲酸和乙醇为原料,分别通过与二氯亚砜和三甲基氯硅烷反应两种不同的酯化方法制备药物中间体4-羧酸乙酯哌啶,产率分别为85。
2% yield at 0~5℃ from 2-methyl-3-butyn-2-ol and thionyl chloride with zinc chloride as catalyst, pyridine as solution and base.
该方法以吡啶为溶剂和缚酸剂,以氯化锌为催化剂,通过2-甲基-3-丁炔-2-醇与二氯亚砜在0～5℃下反应,可生成31。
4-Chlorobenzyl chloride and p-chlorobenzal are prepared from chlorine and chloro toluene in the presence of a catalyst through chlorination, p-chlorobenzal is hydrolyzed into chlorobenzaldehyde over the catalyst.
以氯气和对氯甲苯为主要原料,在催化剂存在下氯化生成对氯氯苄和对氯亚苄,对氯亚苄在催化剂作用下水解生成对氯苯甲醛。