申请人:SCHERING AKTIENGESELLSCHAFT
公开号:EP0440319A1
公开(公告)日:1991-08-07
The invention relates a new process for the the preparation of anellated iminothiazoles of general formula I
in which A is the group -CH₂- or -CH₂CH₂- and R¹ is C₁-C₆-alkyl, C₂-C₆-alkenyl, C₃-C₆-alkynyl or C₁-C₆-alkoxycarbonyl-C₁-C₆-alkyl, which starts from the known aniline of general formula II
in which R² is C₁-C₆-alkyl or phenylmethyl, and goes via new isothiocyanates of general formula IV
new thioureas of general formula VI
and new anellated iminothiazole of general formula VII
本发明涉及一种制备通式I的环融噻唑衍生物的新工艺,其中A为-CH₂-或-CH₂CH₂-基团,R¹为C₁-C₆烷基、C₂-C₆烯基、C₃-C₆炔基或C₁-C₆烷氧羰基-C₁-C₆烷基,该工艺从已知的通式II的苯胺开始,其中R²为C₁-C₆烷基或苯甲基,经过新的异硫氰酸酯通式IV,新的硫脲通式VI,和新的环融噻唑衍生物通式VII制备而成。