申请人:BASF Aktiengesellschaft
公开号:US05162552A1
公开(公告)日:1992-11-10
A process for the preparation of 4-acetals of butene-1,4-dial of the formula ##STR1## where R is an alkyl, alkenyl, cycloalkyl or aralkyl radical of 1 to 12 carbon atoms which may contain alkoxy groups, or the two radicals R together form an alkylene or alkenylene radical of 2 to 10 carbon atoms which may contain alkoxy groups, and R.sup.1 is an alkyl, alkenyl or alkynyl radical of 1 to 12 carbon atoms which may be substituted by cycloaliphatic, aromatic or heterocyclic radicals or by hydroxyl, ether, thioether, acyl, alkylamino, carboxyl or carbalkoxy groups, or is an unsubstituted or substituted aryl radical or an alkoxy, alkylthio or acyloxy group, wherein a glyoxal monoacetal of the formula ##STR2## is reacted with an aldehyde of the formula R.sup.1 --CH.sub.2 --CHO III at up to 150.degree. C., and novel acetals of butene-1,4-dial.
一种制备公式为##STR1##的丁烯-1,4-二醛4-缩醛的方法,其中R是1至12个碳原子的烷基、烯基、环烷基或芳基烷基,可能包含烷氧基,或者两个R基共同形成2至10个碳原子的烷基或烯基基团,可能包含烷氧基,R.sup.1是1至12个碳原子的烷基、烯基或炔基基团,可能被环状脂肪族、芳香族或杂环基团或羟基、醚、硫醚、酰基、烷基氨基、羧基或羧酸酯基取代,或者是未取代或取代的芳基基团或烷氧基、烷硫基或酰氧基。其中,将公式为##STR2##的丙二醛单缩醛与公式为R.sup.1 --CH.sub.2 --CHO III的醛在不超过150℃的条件下反应,得到新型的丁烯-1,4-二醛缩醛。