申请人:BASF Aktiengesellschaft
公开号:US04052398A1
公开(公告)日:1977-10-04
New diazarhodamine-lactones of the formula ##STR1## where R.sup.1 is hydrogen or alkyl of 1 to 4 carbon atoms, R.sup.2 is alkyl of 1 to 4 carbon atoms, unsubstituted phenyl or phenyl substituted by one or two alkyls of 1 to 3 carbon atoms, chlorine and/or bromine, R.sup.3 and R.sup.4 independently of one another are hydrogen, alkyl of 1 to 7 carbon atoms, cycloalkyl of 5 to 7 carbon atoms, phenylalkyl of 7 to 10 carbon atoms or alkoxyalkyl of a total of 3 to 8 carbon atoms, or the group ##STR2## is a 5-membered, 6-membered or 7-membered saturated heterocyclic ring or a 6-membered saturated heterocyclic ring which additionally contains an --O--, --S-- or --N--group, wherein R.sup.6 is hydrogen, methyl or ethyl and R.sup.5 is unsubstituted phenyl or phenyl substituted by alkyl of 1 to 3 carbon atoms, methoxy, chlorine or bromine. The lactones (I) exhibit improved stability and therefore do not stain coated paper. On papers coated with acid receptive layers, copies which instantly exhibit their full depth of color are obtained.
新的二氧杂罗丹明内酯的化学式为##STR1##其中R.sup.1是氢或1到4个碳原子的烷基,R.sup.2是1到4个碳原子的烷基,未取代的苯基或被1到3个碳原子的烷基,氯和/或溴取代的苯基,R.sup.3和R.sup.4独立地为氢,1到7个碳原子的烷基,5到7个碳原子的环烷基,7到10个碳原子的苯基烷基或总碳原子数为3到8的烷氧烷基,或者##STR2##是一个5个、6个或7个成员的饱和杂环环或一个额外含有--O--,--S--或--N--基团的6个成员的饱和杂环环,其中R.sup.6是氢、甲基或乙基,R.sup.5是未取代的苯基或被1到3个碳原子的烷基,甲氧基,氯或溴取代的苯基。该内酯(I)具有改善的稳定性,因此不会染色涂层纸。在涂有酸接受层的纸上,可以获得瞬间呈现其全部颜色的副本。