发明授权
US4168378A 3-(9-Julolidinyl)-3-(diphenylamino)phthalides 失效
3-(9-奎宁环)-3-(二苯基氨基)苯并二氮杂环己烷

3-(9-Julolidinyl)-3-(diphenylamino)phthalides
摘要:
3-[4-Disubstituted-amino)phenyl] or (9-julolidinyl)-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive and thermal marking systems are prepared by reaction of 2-[4-disubstituted-amino)benzoyl] or (9-julolidinyl-carbonyl)benzoic acids with diphenylamines.
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