RACEMIC ENANTIOMERS RESOLUTING

摘要

Disclosed are a process for resolution of racemic enantiomers to prepare sulfoxide compounds as a single enantiomer or in an enantiomerically enriched form and salts thereof as a single enantiomer or in an enantiomerically enriched form, and S-(-)-levo-timoprazole, S-(-)-levo-picoprazole, S-(-)-levo-omeprazole, S-(-)-levo-pantoprazole and S-(-)-levo-lansoprazole prepared thereby. Formula (I) timoprazole: R1= R2=R3=R4=R5=R6=R7=H picoprazole: R1=R2=H, R3=CH3, R4=R7=H, R5=CO2CH3, R6=CH3 omeprazole: R1=CH3, R2=OCH3, R3=CH3, R4=R6=R7=H, R5=OCH3 lansoprazole: R1=H, R2=OCH2CF3, R3=CH3, R4=R5=R6=R7=H pantoprazole: R1=H, R2=OCH3, R3=OCH3, R4=R6=R7=H, R5=OCHF2