4,4'-二辛基二苯胺 、 2-[(1-乙基-2-甲基-1H-吲哚-3-基)羰基]苯甲酸 以there was obtained a quantitative yield of 3-(1-ethyl-2-methyl-3-indolyl)-3-[N,N-bis-(4-octylphenyl)amino]phthalide, m.p. 106°-108° C的产率得到3-(1-ethyl-2-methyl-3-indolyl)-3-[N,N-bis-(4-octylphenyl)amino]phthalide
3-Heteroaryl-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems are prepared by reacting 2-(heteroarylcarbonyl)-benzoic acids with diphenylamines.
Pressure sensitive carbonless duplicating systems and thermal marking
申请人:Sterling Drug Inc.
公开号:US04251092A1
公开(公告)日:1981-02-17
3-Heteroaryl-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems are prepared by reacting 2-(heteroarylcarbonyl)benzoic acids with diphenylamines.