The invention relates to a process for producing a (±)-3-alkyl-3,4-dihydro-2H-[1,4]benzoxazine derivative of formula (II) by stepwise racemization procedure.
The invention further provides a process for optical resolution through the formation of a salt between a (±)-benzoxazine compound and an optically active form of camphor-10-sulfonic acid. Without requiring the conventional expensive resolution reagents, this process not only assures production of an optically active isomer of compound (II) in high purity but also permits reuse of the optical resolution reagent.
本发明涉及一种通过分步消旋化程序生产式(II)的(±)-3-烷基-3,4-二氢-2H-[1,4]苯并恶嗪衍
生物的工艺。
本发明进一步提供了一种通过在(±)-苯并恶嗪化合物和
樟脑-10-
磺酸的光学活性形式之间形成盐来进行光学解析的工艺。该工艺不需要传统的昂贵的分辨试剂,不仅能确保生产出高纯度的化合物(II)的光学活性异构体,还能重复使用光学分辨试剂。