申请人:Polaroid Corporation
公开号:US04128425A1
公开(公告)日:1978-12-05
In one embodiment, the present invention relates to pyrazolidine derivatives, some of which are novel compounds, all of which are represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 taken individually, the same or different, are each hydrocarbon moieties containing up to about 20 carbon atoms selected from alkyl, aryl, aralkyl and alkaryl, which moieties may be unsubstituted or substituted with a substituent selected from carboalkoxyalkyl, aryl, alkyl, alkoxy, hydroalkyl, aminoalkyl, ketalalkyl and acetalalkyl, and R.sup.1 and R.sup.2 taken together represent the carbon atoms necessary to complete a cyclic moiety selected from: ##STR2## which cyclic moieties may be unsubstituted or substituted with the above-identified substituents; Y is --OH or --NH.sub.2 ; and X is --OH, --NH.sub.2, --NH.sub.2.Z where Z is a salt, or --NHR where R is alkyl or aryl. In another embodiment, the present invention is directed to the use of the above-denoted class of compounds as photographic silver halide developing agents and to photographic processes, products and compositions employing the same.
在一种实施方式中,本发明涉及吡唑啉衍生物,其中一些是新化合物,全部由以下公式表示:##STR1## 其中R.sup.1和R.sup.2单独取,相同或不同,均为含有多达约20个碳原子的碳氢基团,所述基团被选择自烷基,芳基,芳基烷基和烷芳基,所述基团可以是未取代或取代的,所述取代基被选择自碳氧烷氧基烷基,芳基,烷基,烷氧基,羟基烷基,氨基烷基,酮基烷基和缩醛基烷基,R.sup.1和R.sup.2在一起表示必要的碳原子,以完成所选择的环状基团之一,所述环状基团被选择自以下之一:##STR2## 所述环状基团可以是未取代或取代的,所述取代基与上述鉴定的取代基相同;Y是--OH或--NH.sub.2;X是--OH,--NH.sub.2,--NH.sub.2.Z,其中Z是盐,或--NHR,其中R是烷基或芳基。在另一种实施方式中,本发明涉及将上述类化合物用作照相银卤化物显影剂,以及使用相同的照相工艺,产品和组合物。