A process for preparing a 2-halopyrimidine derivative represented by the formula: ##SPC1## Wherein R.sup.2 represents a hydrogen atom, a halogen atom, a lower alkyl group, an aryl group, and an amino group and R.sup.4 represents a lower alkyl group and X represents a halogen atom, which comprises reacting cyanoacetimidate derivative represented by the formula: ##EQU1## wherein R.sup.2 and R.sup.4 represent the same as above and M represents a mineral acid residue with cyanamide, to produce an N-cyanocyanoacetimidate ##EQU2## represented by the formula: WHEREIN R.sup.2 and R.sup.4 represent the same as above, and thereafter reacting said N-cyanocyanoacetimidate with a hydrogen halide.
一种制备2-卤代
嘧啶衍
生物的方法,该衍
生物由以下式子表示:##
SPC1##
其中R.sup.2表示氢原子、卤素原子、较低的烷基、芳基和
氨基,R.sup.4表示较低的烷基,X表示卤素原子,包括以下步骤:将以下式子表示的
氰基乙
酰亚胺衍
生物与
氰胺反应,制备N-
氰基
氰基乙
酰亚胺##EQU2##,该式中R.sup.2和R.sup.4的含义与上述相同,M表示矿物酸残基,然后将所述N-
氰基
氰基乙
酰亚胺与氢卤酸反应。