The present invention provides a method of producing tert-leucine, which includes reacting tert-leucine with substituted benzenesulfonic acid represented by the following formula (1)
wherein R1 and R2 are each independently a hydrogen atom, an alkyl group or a halogen atom, except a compound wherein R1 and R2 are both hydrogen atoms, in a solvent, to give tert-leucine.substituted benzenesulfonate represented by the following formula (2)
wherein R1 and R2 are the same substituents as above, separating the salt by crystallization and then dissociating the salt. According to the present invention, a production method of tert-leucine is provided, which includes forming a tert-leucine salt hardly soluble in a solvent and crystallization thereof to efficiently recover tert-leucine from the solvent.
本发明提供了一种生产tert-亮
氨酸的方法,其中包括将tert-亮
氨酸与以下公式(1)所表示的取代
苯磺酸反应,其中R1和R2分别是氢原子、烷基或卤素原子,但不包括R1和R2均为氢原子的化合物,反应溶剂中,得到以下公式(2)所表示的tert-亮
氨酸取代
苯磺酸,其中R1和R2是上述相同的取代基,在结晶过程中分离出盐,然后解离盐。根据本发明,提供了一种生产tert-亮
氨酸的方法,其中包括形成难溶于溶剂的tert-亮
氨酸盐并结晶,以有效地从溶剂中回收tert-亮
氨酸。