申请人:Ciba-Geigy Corporation
公开号:US05308545A1
公开(公告)日:1994-05-03
The invention relates to pyrazoline compounds of formula ##STR1## wherein R.sub.1 is hydrogen or methyl, R.sub.2 and R.sub.3 are each independently of the other methyl, ethyl or hydroxyethyl, R.sub.4 is hydrogen or chlorine, R.sub.5 and R.sub.6 are each independently of the other hydrogen or methyl, R.sub.7 is hydrogen, methyl or phenyl, n is 0 or 1, with the proviso that, if n is 0 and R.sub.4 to R.sub.7 are hydrogen, R.sub.2 is methyl and R.sub.3 is hydroxyethyl, and X.sup..crclbar. is a C.sub.1 -C.sub.3 alkanoate, C.sub.1 -C.sub.4 alkanephosphonate, C.sub.1 -C.sub.4 alkanesulfonate, phosphite, sulfamate or glycolate anion and, if R.sub.1 is methyl, X.sup..crclbar. is also a methosulfate, chloride or bromide ion, to the preparation of said compounds, to the use thereof as fluorescent whitening agents, and to novel hydrazine intermediates of formula ##STR2## wherein R.sub.2 and R.sub.3 are methyl, ethyl or hydroxyethyl, and the acetone hydrazones and salts thereof.
本发明涉及式为##STR1##的吡唑啉化合物,其中R.sub.1是氢或甲基,R.sub.2和R.sub.3各自独立地为甲基、乙基或羟乙基,R.sub.4是氢或氯,R.sub.5和R.sub.6各自独立地为氢或甲基,R.sub.7是氢、甲基或苯基,n为0或1,但是,如果n为0且R.sub.4到R.sub.7都是氢,R.sub.2是甲基,R.sub.3是羟乙基,且X.sup..crclbar.是C.sub.1-C.sub.3烷基酸盐、C.sub.1-C.sub.4烷基磷酸盐、C.sub.1-C.sub.4烷基磺酸盐、亚磷酸酯、磺酰胺盐或甘酸盐阴离子,如果R.sub.1是甲基,X.sup..crclbar.还是甲基磺酸盐、氯化物或溴化物离子,本发明还涉及所述化合物的制备方法、将其用作荧光增白剂的用途,以及式为##STR2##的新型腈类中间体和其乙酰丙酮肼和盐。