申请人:Bayer Aktiengesellschaft
公开号:US05352787A1
公开(公告)日:1994-10-04
5-Trifluoromethyl-uracil is obtained by chlorinating thymine under mild conditions, further chlorinating the resulting 2,4-dichloro-5-methyl-pyrimidine under drastic conditions to give 2,4-dichloro-5-trichloromethylpyrimidine, reacting the latter with a fluorinating agent to give 2,4-fluorinated and/or -chlorinated 5- trifluoromethylpyrimidines and subjecting these to hydrolysis. The novel chemical compounds 2,4-dichloro- 5-trichloromethylpyrimidine and 2,4-difluoro-5-trifluoromethylpyrimidine are obtained in the course of this process.
5-三氟甲基尿嘧啶是在温和条件下氯化胸腺嘧啶得到的,进一步在激烈条件下氯化得到2,4-二氯-5-甲基嘧啶,然后将其与氟化试剂反应得到2,4-氟化和/或-氯化的5-三氟甲基嘧啶,并将其进行水解。在此过程中获得了新的化学化合物2,4-二氯-5-三氯甲基嘧啶和2,4-二氟-5-三氟甲基嘧啶。