申请人:Ciba Geigy Corporation
公开号:US04542216A1
公开(公告)日:1985-09-17
A novel process for producing fluoroalkoxyaminopyrimidines of the formula I ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or benzyl, X is halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -haloalkoxy, C.sub.1 -C.sub.4 -alkylamino or di-C.sub.1 -C.sub.4 -alkylamino, and T is hydrogen, chlorofluoromethyl, bromofluoromethyl, difluoromethyl or 1,2,2,2-tetrafluoroethyl, characterized in that a thiopyrimidine of the formula II ##STR2## wherein Y has the meaning given for X under the formula I or is hydroxyl, A is hydrogen, sodium, potassium or an equivalent of calcium or magnesium, and Q is C.sub.1 -C.sub.4 -alkyl, phenyl or benzyl, is reacted with difluorochloromethane, difluorobromomethane, tetrafluoroethylene, perfluoropropylene, trifluorobromoethylene or trifluorochloroethylene in the presence of a base; the resulting compound of the formula III ##STR3## is converted by oxidation into a compound of the formula IV ##STR4## wherein n is the number one or two; and this compound is treated with an amine of the formula V H--NH--R (V).
一种制备式I的氟烷氧基氨基嘧啶的新工艺,其中R为氢,C.sub.1-C.sub.4-烷基,C.sub.1-C.sub.4-烷氧基或苄基,X为卤素,C.sub.1-C.sub.4-烷基,C.sub.1-C.sub.4-烷氧基,C.sub.1-C.sub.4-卤代烷基,C.sub.1-C.sub.4-卤代烷氧基,C.sub.1-C.sub.4-烷基氨基或二C.sub.1-C.sub.4-烷基氨基,T为氢,氯氟甲基,溴氟甲基,二氟甲基或1,2,2,2-四氟乙基,其特征在于将式II的硫代嘧啶与二氟氯甲烷、二氟溴甲烷、四氟乙烯、全氟丙烯、三氟溴乙烯或三氟氯乙烯在碱的存在下反应;得到的式III的化合物被氧化成为式IV的化合物,其中n为1或2;然后将该化合物与式V H--NH--R(V)的胺反应。