Process for the preparation and purification of cis-2-methylspiro(1,3-oxathiolane-5,3')quiniclidine hydrochloride
申请人:Bratovanov Svetoslav S.
公开号:US20090182146A1
公开(公告)日:2009-07-16
An industrially acceptable process for the preparation and purification of cis-2-methylspiro(1,3-oxathiolane-5,3′)quiniclidine from a cisitrans mixture of isomers. Treatment of the mixture with an organic sulfonice acid generates a less soluble acid addition salt that is enriched in the cis-isomer. Recrystallization or pulping using various organic solvents allows for enrichment of the cis-isomer by filtration. These new sulfonic acid salts of the cis-isomer of 2-methylspiro(1,3-oxathiolane-5,3′)quiniclidine prepared according to the present invention could be further converted into the hydrochloride salt by any known procedures such as treatment with a base and then hydrochloric acid salt formation or exchange of the sulfonic acid salt with hydrochloric acid.
一种工业上可接受的过程,用于从顺式/反式异构体的混合物中制备和纯化cis-2-甲基螺(1,3-噻吩环-5,3′)喹诺啉。用有机磺酸处理混合物会产生一种溶解性较低的酸加合盐,其中富集了顺式异构体。通过结晶再结晶或使用各种有机溶剂进行过滤,可以实现对顺式异构体的富集。根据本发明制备的cis-异构体2-甲基螺(1,3-噻吩环-5,3′)喹诺啉的这些新磺酸盐可以通过任何已知的程序进一步转化为盐酸盐,例如用碱处理然后形成盐酸盐,或者用盐酸交换磺酸盐。