申请人:The Hilton-Davis Chemical Co.
公开号:US04477676A1
公开(公告)日:1984-10-16
Mono-, bis- and tris-indolyl-substituted furanones useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared respectively by: the interaction of an indole with mucochloric acid; the interaction of an indole with a 4-mono(indolyl)-substituted 4-oxo-2-butenoic acid; and by the interaction of an indole with a 2,4-bis(indolyl)-substituted 4-oxobutanoic acid or with a 3,5-bis(indolyl)-substituted furanone.
单-, 双-, 和三-吲哚基取代的呋喃酮在无碳复写和热标记系统中作为色形成剂有用,其分别通过以下方法制备:吲哚与氯黏酸的反应;吲哚与4-单(吲哚基)取代的4-氧代-2-丁烯酸的反应;以及吲哚与2,4-双(吲哚基)取代的4-氧代丁酸或3,5-双(吲哚基)取代的呋喃酮的反应。