A process to isolate a compound of Formula (2a) or a salt or solvate thereof, comprising a) reacting a mixture of diastereoisomers of Formulae (2a, 2b) with a basic heterocyclic-aldehyde compound and an optically active amine in the presence of a base; and b) separating the compound of Formula (2a) from the product of step a) by acid extraction. The compound of Formula (2a) may be produced with an enantiomeric excess of 98%. Compounds of Formula (2a) are useful intermediates in a process to prepare a bicyclic γ-amino tetrazole derivative of Formula (I) which finds utility in treating neuropathic pain and disorders of the central nervous system.
一种分离式(2a)化合物或其盐或溶液的工艺,包括 a) 在碱存在下,将式(2a、2b)非对映异构体混合物与碱性杂环醛化合物和光学活性胺反应;以及 b) 通过酸萃取将式(2a)化合物与步骤 a 的产物分离。式(2a)化合物的对映体过量率可达 98%。式(2a)化合物是制备式(I)双环γ-
氨基
四唑衍
生物过程中的有用中间体,该衍
生物可用于治疗神经性疼痛和中枢神经系统疾病。