| 摘要 |
1,265,765. Laevo - 6 - phenyl - 2,3,5,6 - tetrahydroimidazo [2,1 - b] thiazole hydrochloride. RHONE-POULENC S.A. 23 April, 1970 [24 April, 1969], No. 19646/70. Heading C2C. The title compound is separated from its admixture with dl-isomer, by fractional solution in aq. medium. The initial l-/dl-HCl salt mixture may be obtained by (e.g.) making the salt of the dl-base with l-di-(p-tolyl) tartaric acid, obtaining such salt enriched in the l-base by fractional precipitation, and converting this enriched salt to the correspondingly enriched HCI salt. |
