申请人:——
公开号:US20010025118A1
公开(公告)日:2001-09-27
The present invention provides a process for preparing a compound of the general formula (I):
1
wherein R
1
to R
5
are independently selected from hydrogen, halogen, C
1-6
alkyl, C
2-6
alkenyl, C
2-6
alkynyl or C
1-6
alkoxy, all optionally substituted by one or more of halogen, hydroxy and aryl groups, as well as being independently selected from amino, mono- or disubstituted amino, alkenyloxy, acyl, acyloxy, cyano, nitro, aryl and alkylthio groups, which process comprises reacting a compound of the general formula (II):
2
wherein R
1
to R
5
are as defined in formula (I), with aminoguanidine bicarbonate in a mixture of a water-soluble solvent and polyphosphoric acid.
本发明提供了一种制备一般式(I)化合物的方法:其中R1到R5分别独立地选择自氢、卤素、C1-6烷基、C2-6烯基、C2-6炔基或C1-6烷氧基,均可选自一个或多个卤素、羟基和芳基取代,同时独立地选择自氨基、单取代或双取代氨基、烯氧基、酰基、酰氧基、氰基、硝基、芳基和烷基硫基的化合物的方法,其中所述方法包括将一般式(II)的化合物:其中R1到R5如式(I)中定义,与氨基胍碳酸氢盐在水溶性溶剂和聚磷酸的混合物中反应。