申请人:Bayer Aktiengesellschaft
公开号:US05196541A1
公开(公告)日:1993-03-23
There is described a new process for the preparation of substituted 3-aminoacrylic esters of the general formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, X and n have the meaning given in the description. The 3-aminoacrylic esters of the formula (I) are obtained by reacting acetic esters of the formula (II) R.sup.1 --(X).sub.n --CH.sub.2 --COOR.sup.2 (II) with orthoformic acid diamide esters of the formula (III) ##STR2##
描述了一种制备通式(I)中取代的3-氨基丙烯酸酯的新工艺,其中R.sup.1、R.sup.2、R.sup.3、R.sup.4、X和n的含义如描述中所述。通式(I)中的3-氨基丙烯酸酯是通过将通式(II)R.sup.1--(X).sub.n--CH.sub.2--COOR.sup.2(II)的乙酸酯与通式(III)的正甲酸二酰胺酯反应而获得的。