[EN] PROCESS FOR THE PREPARATION OF TETRAZINE DERIVATIVES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS DE TÉTRAZINE
申请人:RELIANCE LIFE SCIENCES PVT LTD
公开号:WO2010058430A1
公开(公告)日:2010-05-27
The present invention provides a process for the preparation of a tetrazine derivative of formula (I), or a pharmaceutically acceptable salt thereof wherein R1 represents a hydrogen atom, a straight or branched C1-C6 alkyl group, C2-C6 alkenyl group or C2-C6 alkynyl group, which C1-C6 alkyl group, C2-C6 alkenyl group and C2-C6 alkynyl group is unsubstituted or substituted with 1, 2 or 3 substituents selected from halogen atoms, straight or branched C1-C4 alkoxy groups, C1-C4 alkylthio groups, C1-C4 alkylsulphinyl groups, C1-C4 alkylsulphonyl groups and phenyl groups, which phenyl groups are unsubstituted or substituted with one or more substituents selected from C1-C4 alkyl groups, C1-C4 alkoxy groups and nitro groups; or R1 represents a C3-C8 cycloalkyl group; and R2 represents a group of formula -(C=O)NR3R4, wherein R3 and R4 are independently selected from hydrogen atoms, C1-C4 alkyl groups, C2-C4 alkenyl groups and C3-C8 cycloalkyl groups, which process comprises: i) providing a compound of formula (III), wherein R1 is as defined; R1-N=C=O ii) absorbing the compound of formula (III) into a solvent to obtain a solution of the compound of formula (III); iii) adding to the thus obtained solution a compound of formula (II), to obtain a compound of formula (I), as defined above, wherein R2 is as defined above; iv) decomposing any excess compound of formula (III) remaining by addition of water; and v) optionally salifying the thus obtained compound with a pharmaceutically acceptable acid, or base.
本发明提供了一种制备式(I)的四氮杂苯衍生物或其药学上可接受的盐的方法,其中R1代表氢原子、直链或支链的C1-C6烷基、C2-C6烯基或C2-C6炔基,所述的C1-C6烷基、C2-C6烯基和C2-C6炔基未取代或取代有1、2或3个卤素原子、直链或支链的C1-C4烷氧基、C1-C4烷基硫基、C1-C4烷基亚砜基、C1-C4烷基砜基和苯基,所述的苯基未取代或取代有一个或多个选自C1-C4烷基、C1-C4烷氧基和硝基的取代基;或者R1代表C3-C8环烷基;R2代表式-(C=O)NR3R4的基团,其中R3和R4独立地选自氢原子、C1-C4烷基、C2-C4烯基和C3-C8环烷基,所述方法包括:i)提供式(III)的化合物,其中R1如上所定义;R1-N=C=O ii)将式(III)的化合物吸收到溶剂中以获得式(III)的溶液;iii)向所得溶液中加入式(II)的化合物,以获得如上所定义的式(I)的化合物,其中R2如上所定义;iv)通过加入水分解任何剩余的式(III)的过量化合物;v)可选地用药学上可接受的酸或碱盐化所得化合物。