申请人:Lucky Ltd.
公开号:US05480993A1
公开(公告)日:1996-01-02
The present invention relates to a novel process for preparing sulfonylurea derivatives of formula (I) in a high purity and a high yield characterized in that a sulfonylchloride of formula (V) is reacted with 2-amino-4,6-dimethoxypyrimidine of formula (VII) in the presence of a metal cyanate and an organic base catalyst or a compound of formula (VIII) is reacted with 2-amino-4,6-dimethoxypyrimidine of formula (VII): ##STR1## wherein R.sup.1 represents hydrogen, C.sub.1 -C.sub.4 alkyl or phenyl, R.sup.2 represents hydrogen, C.sub.1 -C.sub.4 alkyl, allyl or propargyl and R.sup.3 represents hydrogen, methyl, ethyl or phenyl, and to a process for preparing the sulfonylchloride compound of formula (V) above and the compound of formula (VIII) above, both of which are useful as an intermediate compound for preparing the sulfonylurea derivative of formula (I) and to a novel intermediate compound of formula (VIII) as defined above.
本发明涉及一种新型工艺,用于制备式(I)的磺酰脲衍生物,其具有高纯度和高产率,其特征在于在金属氰酸盐和有机碱催化剂的存在下,将式(V)的磺酰氯与式(VII)的2-氨基-4,6-二甲氧基嘧啶反应,或将式(VIII)的化合物与式(VII)的2-氨基-4,6-二甲氧基嘧啶反应,制备所述磺酰脲衍生物:##STR1## 其中R.sup.1表示氢、C.sub.1-C.sub.4烷基或苯基,R.sup.2表示氢、C.sub.1-C.sub.4烷基、烯丙基或丙炔基,R.sup.3表示氢、甲基、乙基或苯基,并且涉及制备上述式(V)的磺酰氯化合物和式(VIII)的化合物,两者均可用作制备式(I)的磺酰脲衍生物的中间体化合物,还涉及定义如上的式(VIII)的新型中间体化合物。