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US 4,225,708 AGranted
2-Sulfamoyl-5-sulfamido-1-naphthols
AssigneeKonishiroku Photo Industry Co., Ltd.
InventorsMasaru Kanbe, Kazumasa Watanabe, Morito Uemura, Jiro Takahashi, Ryuichiro Kobayashi, Tatsuhiko Kobayashi
Life of this patent
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Abstract
2-Sulfamoyl-5-sulfamido-1-naphthols represented by the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can be the same or different and each represent a hydrogen atom, a straight-chain alkyl group, a branched alkyl group or a cycloalkyl group; or R.sup.1 and R.sup.2 can be connected with each other, together with the nitrogen atom, to form a ##STR2##
Claims12
A compound represented by the formula:
- ##STR13## wherein R.sup.1, R.sup.2 R.sup.3 and R.sup.4, which may be the same or different, independently represent a hydrogen atom, a straight-chain alkyl group having 1 to 6 carbon atoms, a branched alkyl group having 3 to 6 carbon atoms or a cycloalkyl group having 5 to 6 carbon atoms or R.sup.1 and R.sup.2 may be connected with each other, together with the nitrogen atom, to form a ##STR14##
Dependencies are inferred from the claim text.