申请人:Degussa Aktiengesellschaft
公开号:US04469876A1
公开(公告)日:1984-09-04
L-proline is produced from the methyl or ethyl ester of L-pyroglutamic acid by reacting this with at least twice the molar amount of phosgene to form the corresponding 1-chlorocarbonyl-5,5-dichloroproline ester, producing the corresponding 2-chloro-1-chlorocarbonyl-pyrrolin-(2)-carboxylic acid ester-(5) therefrom by splitting off hydrogen chloride, catalytically hydrogenating the pyrrolin-(2) compound to the corresponding N-chlorocarbonyl-proline ester and hydrolyzing the latter with acid to form L-proline.
L-脯氨酸是通过将L-
吡咯烷酸的甲基或乙基酯与至少两倍摩尔量的
光气反应,形成相应的1-
氯甲酰-5,5-二
氯脯
氨酸酯,通过裂解
氯化氢生成相应的2-
氯-1-
氯甲酰
吡咯烯(2)-
羧酸酯(5),催化氢化
吡咯烯(2)化合物得到相应的N-
氯甲酰脯
氨酸酯,然后用酸
水解后形成
L-脯氨酸。