Reference

Reactive dyes for cellulosic fibers

Reactive dyes for cellulosic fibers. (Mitsubishi Chemical Industries Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 58191754 A2 9 Nov 1983 Showa, 5 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C09B062-51. APPLICATION: JP 82-75855 6 May 1982.Several substances with their cas registry numbers 121-47-1 and 89092-06-8 may be metioned in this study. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The title dyes, dyeing cellulosic fibers in deep yellow shades, were prepd. having the general formula I (R1 = H, Me, Et; R2, R3 = H, Me, MeO, sulfo; R4 = H, Me, MeO, EtO; R5 = H, Me, AcNH, Cl; R6 = aliph. or arom. amino group contg. 1 or 2 sulfo groups). Thus, II [4882-79-5] was condensed with 3-aminobenzenesulfonic acid [121-47-1] and then with 3-(2-sulfatoethylsulfonyl)aniline [2494-88-4], stirred at 90-95° at pH 5-6 for 10 h, and salted with KCl to give I (R1 = Me; R2 = R3 = R4 = R5 = H; R6 = NHC6H4SO3H-m; m-SO2CH2CH2OSO3H) [89092-13-7] with Cl-fastness rating (on cotton, JIS 0884) 5. .

N-Acetylaminoarylsulfonic acids

N-Acetylaminoarylsulfonic acids. Arndt, Otto; Papenfuhs, Theodor (Hoechst A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3219651 A1 1 Dec 1983, 29 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C07C143-675. APPLICATION: DE 82-3219651 26 May 1982. DOCUMENT TYPE: Patent CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Title acids were prepd. by acetylation of aminoarylsulfonic acids with Ac2O or AcCl in H2SO4 contg. small amts. of H2O, DMF, or N-methylpyrrolidone (or mixts. 121-62-0 and 121-47-1 which are cas registry numbers are also used here. of these). Thus, 866 wt. parts metanilic acid was added to 645 wt. parts Ac2O and 1,005 wt. parts 99.5% H2SO4 during 1 h while increasing the temp. from 20 to 40°. The mixt. was heated to 80° and an addnl. 60 wt. parts Ac2O were added to give 1,350 wt. parts N-acetylmetanilic acid (I) of 75% purity. I was treated with SOCl2 to give 83% the acid chloride. The isomers of I as well as 2-acetamido-6(or 8)-naphthalene sulfonic acid were prepd. similarly. .