Processes for preparing pure tiagabine, a piperidine carboxylic acid, using pharmaceutically acceptable acid addition salts of tiagabine esters are provided. L(+)-tartaric acid, oxalic acid and dibenzoyl L(+)-tartaric acid addition salts of tiagabine esters are also provided. Further, processes for preparing acid addition salts of tiagabine esters are provided.
本发明提供使用药用可接受的酸加盐的tiagabine酯制备纯tiagabine的过程。同时提供L(+)-
酒石酸、
草酸和dibenzoyl L(+)-
酒石酸的tiagabine酯加盐。此外,还提供制备tiagabine酯酸加盐的过程。