申请人:Bayer Aktiengesellschaft
公开号:US04265832A1
公开(公告)日:1981-05-05
A process for the preparation of an anthranilamide of the formula ##STR1## in which R.sub.1 and R.sub.2 each independently is hydrogen or C.sub.1 to C.sub.4 alkyl, or R.sub.1 and R.sub.2, together with the nitrogen atom to which they are bonded, form a heterocyclic ring, comprising reacting isatoic anhydride of the formula ##STR2## with an approximately equimolar amount of an amine of the formula ##STR3## in water at a pH of about 7 to 10.5 and a temperature of about 20.degree. to 100.degree. C. Advantageously the reaction is effected in the presence of a buffer system comprising an amine of the formula ##STR4## plus at least one of a hydrohalide and carbonic acid salt of such amine, e.g. ammonia or a lower alkyl amine plus the corresponding hydrochloride and/or carbonate.
一种制备式为##STR1##中的蒽酰胺的过程,其中R.sub.1和R.sub.2各自独立地是氢或C.sub.1到C.sub.4烷基,或者R.sub.1和R.sub.2连同它们所连接的氮原子形成一个杂环,包括将式为##STR2##的异安息香酸酐与式为##STR3##的胺在水中以pH约为7到10.5、温度约为20℃到100℃的条件下反应。有利地,反应在缓冲体系的存在下进行,所述缓冲体系包括式为##STR4##的胺和该胺的羟酸盐和碳酸盐中的至少一个,例如氨或低烷基胺加上相应的盐酸和/或碳酸盐。