A process for the preparation of a substituted trialkylsilyloxymalonic acid dinitrile of the formula ##STR1## in which R.sup.1 is optionally substituted alkyl, optionally substituted cycloalkyl, optionally substituted aryl or optionally substituted heteroaryl, R.sup.2 is C.sub.1-4 -alkyl and n is an integer from 1 to 4, comprising reacting a trialkylsilyl cyanide of the formula (R.sup.2).sub.3 SiCN with at least one acyl member selected from the group consisting of (a) an acid halide of the formula ##STR2## in which Hal is fluorine, chlorine, bromine or iodine, (b) an acyl cyanide of the formula ##STR3## (c) a dimeric acyl cyanide or the formula ##STR4##
一种制备式为##STR1##的取代三烷基
硅氧基马隆酸二腈的方法,其中R.sup.1是可选择取代的烷基、可选择取代的环烷基、可选择取代的芳基或可选择取代的杂环烷基,R.sup.2是C.sub.1-4-烷基,n是1到4之间的整数,包括将式为(R.sup.2).sub.3SiCN的三烷基
硅氰与选择自(a)具有式为##STR2##的酸卤化物、(b)具有式为##STR3##的酰基腈、(c)具有式为##STR4##的二聚酰基腈的羧基成员中至少一种反应。