申请人:Henkel Kommanditgesellschaft auf Aktien
公开号:US04880575A1
公开(公告)日:1989-11-14
3-R.sup.1 -3-oxoprop-1-ene-1,1-diphosphonic acids corresponding to the following general formula ##STR1## in which R.sup.1 is a tertiary substituted alkyl group, an optionally substituted cycloalkyl group, or an optionally substituted aryl or heteroaryl group, and M is hydrogen or the cation of a base; to a process for their production in which 3-R.sup.1 -3-oxo-1-aminopropane-1,1-diphosphonic acids corresponding to the following general formula ##STR2## in which R.sup.1 is as defined above, are reacted with an aqueous or alcoholic alkali metal hydroxide solution; then water followed by an alcohol infinitely miscible with water is added to the reaction mixture, and the pure olefinic diphosphonic acids are obtained by addition of an acid; to the use of the above compounds of formula III as complexing agents and as thresholders; and to compositions containing one or more compounds of formula (III).
3-R.sup.1 -3-氧代丙烯-1,1-二膦酸对应于以下一般式##STR1##其中R.sup.1是三级取代烷基,可选择取代的环烷基,或可选择取代的芳基或杂芳基,M是氢或碱的阳离子;其生产方法为3-R.sup.1 -3-氧代-1-氨基丙烷-1,1-二膦酸对应于以下一般式##STR2##其中R.sup.1如上定义,与水合或醇类碱金属氢氧化物溶液反应;然后向反应混合物中加入水,然后加入与水无限混溶的醇,通过加入酸得到纯的烯丙基二膦酸;将上述III式化合物用作络合剂和阈值剂;以及含有一个或多个III式化合物的组合物。