Reference

Fluoran color formers

Fluoran color formers. (Kanzaki Paper Mfg. Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58149952 A2 6 Sep 1983 Showa, 9 pp. (Japanese). (Japan). CODEN: JKXXAF. 88429-63-4 and 102-50-1 are cas registry numbers of chemicals which are used as reagents here. CLASS: IC: C09B011-28; B41M005-12. APPLICATION: JP 82-31543 27 Feb 1982. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Fluorans I (R, R1 = C1-12 alkyl, C7-9 aralkyl; R2 = H, halogen, C1-4 alkyl, C1-2 alkoxy; R3 = H, halogen, C1-4 alkyl) useful in pressure-, heat-, and photosensitive recording media were prepd. Thus, 2-(4-diethylamino-2-hydroxybenzoyl)benzoic acid [5809-23-4] was treated with p-[N-(carboallyloxymethyl)amino]phenol [88429-21-4] in concd. H2SO4 at room temp. for 24 h to give 47% 7-[N-(carboallyloxymethyl)amino]-3-diethylaminofluoran [88429-55-4], black on silica gel. .

Fluoran color formers

Fluoran color formers. (Nippon Kayaku Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59004652 A2 11 Jan 1984 Showa, 9 pp. (Japanese). (Japan). CODEN: JKXXAF.In this article, certain chemicals are used. Some of their cas registry numbers are 90052-20-3 and 73852-10-5 CLASS: IC: C09B011-28; B41M005-12; B41M005-18. APPLICATION: JP 82-111797 30 Jun 1982. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Fluoran color formers useful in heat- or pressure-sensitive recording materials are prepd. having general formula I (R = halogen, NO2; R1, R2 = lower alkyl; R3 = Me, Et; R4R5 = H, benzo; n = 0-4). Thus, 2',4'-dimethoxyacetanilide [23042-75-3] was heated with bromobenzene [108-86-1] in the presence of K2CO3 and powd. Cu under reflux for 12 h, refluxed with KOH-EtOH for 4 h, filtered, and distd. to obtain 95.8% 2,4-dimethoxydiphenylamine [90043-09-7] which was condensed with 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid [5809-23-4] in conc. H2SO4 at 10-20° for 24 h to give 69% I (R = R4 = R5 = H; R1 = R2 = Et; R3 = Me) [73852-10-5], bluish violet on silica gel and navy blue on bisphenol A. .