申请人:Bayer Aktiengesellschaft
公开号:US05126454A1
公开(公告)日:1992-06-30
A process for the preparation of a sulphonylisourea of the formula ##STR1## in which R.sup.1 is an optionally substituted radical selected from the group consisting of alkyl, aralkyl, aryl and heteroaryl, R.sup.2 is alkyl or aralkyl, R.sup.3 is hydrogen, halogen or in each case optionally substituted alkyl or alkoxy, R.sup.4 is hydrogen, halogen or in each case optionally substituted alkyl or alkoxy and Z is nitrogen or a CH grouping, which comprises reacting an isourea of the formula ##STR2## with a sulphonyl halide of the formula R.sup.1 --SO.sub.2 --X (III) in which X is halogen, in the presence of an acid acceptor at a temperature between about -20.degree. C. and +50.degree. C. Some of the compounds II are new.
一种制备式为##STR1##的磺酰基异脲的方法,其中R.sup.1是从烷基,芳基烷基,芳基和杂环芳基中选取的可选择性取代基,R.sup.2是烷基或芳基烷基,R.sup.3是氢,卤素或在每种情况下可选择性取代的烷基或烷氧基,R.sup.4是氢,卤素或在每种情况下可选择性取代的烷基或烷氧基,Z是氮或CH基团,其包括在酸受体存在下,在温度在-20℃至+50℃之间,将式为##STR2##的异脲与式为R.sup.1--SO.sub.2--X(III)的磺酰卤反应,其中X是卤素。其中一些化合物II是新的。