申请人:KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
公开号:EP1209153A3
公开(公告)日:2003-01-15
The present invention discloses a process for the preparation of phenyl (1,3,5-triazin-2-yl)carbamates of the formula (I) wherein R1 is hydrogen atom, C1-C4 alkyl or C1-C4 alkoxy R2 and R3 are independently hydrogen atom, halogen atom, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylthio, C1-C4 haloalkyl, C1-C4 haloalkoxy, C1-C4 haloalkylthio, C2-C4 alkoxyalkyl or NR7R8 R7 and R8 are independently hydrogen atom or C1-C4 alkyl R4, R5 and R6 are independently hydrogen atom, halogen atom, C1-C4 alkyl or C1-C4 alkoxy which comprises:reacting 2-amino-1,3,5-triazines of the formula (II)with diphenyl carbonates of the formula (III) in the presence of alkali metal hydrides in aprotic polar solvents.
本发明揭示了一种制备式(I)苯基(1,3,5-三嗪基)氨基甲酸酯化合物的方法,其中:R1是氢原子、C1-C4烷基或C1-C4烷氧基;R2和R3分别为氢原子、卤原子、C1-C4烷基、C1-C4烷氧基、C1-C4烷硫基、C1-C4卤代烷基、C1-C4卤代烷氧基、C1-C4卤代烷硫基、C2-C4烷氧基烷基或NR7R8;R7和R8分别为氢原子或C1-C4烷基;R4、R5和R6分别为氢原子、卤原子、C1-C4烷基或C1-C4烷氧基。方法包括:在无水极性溶剂中,在碱金属氢化物的存在下,将式(II)的2-氨基-1,3,5-三嗪化合物与式(III)的二苯基碳酸酯反应。