申请人:BASF Aktiengesellschaft
公开号:US04997955A1
公开(公告)日:1991-03-05
1,1-disubstituted ethylene compounds of the general formula I ##STR1## where Z is COOR.sup.2, CN or COR.sup.3, R.sup.1 is an aliphatic, cycloalophatic, araliphatic, aromatic or heterocyclic radical which may be further substituted by functional groups which are inert under the reaction conditions, R.sup.2 is an aliphatic, cycloaliphatic or araliphatic radical of 1 to 15 carbon atoms and R.sup.3 is an aliphatic, cycloaliphatic or araliphatic radical of 1 to 15 carbon atoms which may be substituted by groups which are inert under the reaction conditions, and R.sup.1 together with R.sup.2 or R.sup.1 together with R.sup.3 may furthermore form an alkylene chain of 2 to 10 carbon atoms which may be substituted by groups which are inert under the reaction conditions, are prepared from a formyl compound of the general formula II ##STR2## where Z, R.sup.1, R.sup.2 and R.sup.3 have the above meanings, by a process in which the reaction is carried out in the presence of formaldehyde or paraformaldehyde and (a) a C.sub.1 -C.sub.12 -alkanol or (b) a mixture of a C.sub.1 -C.sub.12 -alkanol and water or (c) with water in the presence of a secondary amine and a protic acid at from 0.degree. to 200.degree. C.
通式I的1,1-二取代乙烯化合物如下:其中Z为COOR.sup.2、CN或COR.sup.3,R.sup.1为脂肪、环脂肪、芳基脂肪、芳香族或杂环基团,可能进一步被在反应条件下惰性的官能团取代,R.sup.2为1至15个碳原子的脂肪、环脂肪或芳基脂肪基团,R.sup.3为1至15个碳原子的脂肪、环脂肪或芳基脂肪基团,可能被在反应条件下惰性的基团取代,且R.sup.1与R.sup.2或R.sup.1与R.sup.3还可以形成2至10个碳原子的烷基链,该链可能被在反应条件下惰性的基团取代,这些化合物是从通式II的甲醛化合物制备而来:其中Z、R.sup.1、R.sup.2和R.sup.3具有上述含义,通过在甲醛或多聚甲醛的存在下进行反应,以及(a)C.sub.1-C.sub.12-醇或(b)C.sub.1-C.sub.12-醇和水的混合物或(c)在二级胺和具有质子的酸存在下与水在0°C至200°C范围内进行反应的方法。