作者:Chikara Hongo、Ryuzo Yoshioka、Masanori Tohyama、Shigeki Yamada、Ichiro Chibata
DOI:10.1246/bcsj.57.1328
日期:1984.5
The chemical synthesis of isoleucine leads to a mixture of DL-isoleucine and DL-alloisoleucine. The preparation of DL-isoleucine from the mixture was studied. When the mixture was reacted with 1,5-naphthalenedisulfonic acid in water, DL-isoleucine formed the less soluble 1,5-naphthalenedisulfonate and could be separated in the form of the salt from the mixture. The soluble DL-alloisoleucine salt was
异亮氨酸的化学合成导致 DL-异亮氨酸和 DL-异亮氨酸的混合物。研究了从混合物中制备 DL-异亮氨酸。当混合物与水中的 1,5-萘二磺酸反应时,DL-异亮氨酸形成溶解度较低的 1,5-萘二磺酸盐,可以以盐的形式从混合物中分离出来。在水杨醛和游离异亮氨酸混合物的存在下,通过在乙酸中加热,可容易地使可溶性 DL-别异亮氨酸盐差向异构化。两种非对映异构体外消旋体之间的不对称转化通过溶解性较差的 DL-异亮氨酸盐的分级结晶和可溶性 DL-异亮氨酸盐的差向异构化的同时组合进行。