申请人:Sterling Drug Inc.
公开号:US04075224A1
公开(公告)日:1978-02-21
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.
一种用作颜色形成剂的单-、双-和三-吲哚取代呋喃酮,特别适用于无碳复写和热标记系统,分别通过以下方法制备:吲哚与黏氯酸相互作用;吲哚与4-单(吲哚基)-取代的4-氧代-2-丁烯酸相互作用;以及吲哚与2,4-双(吲哚基)-取代的4-氧代丁酸或与3,5-双(吲哚基)-取代的呋喃酮相互作用。