Reference

Use of bis(stilbene) derivatives as fluorescent whiteners for organic textile materials

Use of bis(stilbene) derivatives as fluorescent whiteners for organic textile materials. Weber, Kurt; Liechti, Peter; Meyer, Hans Rudolf; Siegrist, Adolf E. (Ciba-Geigy A.-G., Switz.Chemicals with cas numbers 33771-74-3 and 587-04-2 also play role.). Swiss CH 580702 15 Oct 1976, 12 pp. Division of Swiss 554,848, Addn. to Swiss 566,420. (Unavailable). (Switzerland). CODEN: SWXXAS. CLASS: IC: D06L003-12. APPLICATION: CH 69-4791 27 Mar 1969. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Fluorescent whiteners (I, R = Na, Na-K mixt.; R = Cl, SO2NMe2) were prepd. and used to whiten polyamide fibers and cotton finished with amino resins. Thus, a mixt. of 4,4'-bis[(diethoxyphosphinyl)methyl]biphenyl [17919-34-5], 2-ClC6H4CHO [89-98-5], and 2-NaO3SC6H4CHO [1008-72-6] was heated in the presence of KOH in DMF to give I(R = Na-K mixt., R1 = 2-Cl) [31207-32-6]. The other I were similarly prepd. .

Styryl derivatives

Styryl derivatives. Weber, Kurt (Ciba-Geigy A.-G., Switz.). Ger. Offen. DE 2652891 2 Jun 1977, 44 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C07D317-46. PRIORITY: CH 75-15198 24 Nov 1975. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Fluorescent whiteners (I, R = H, Cl; R1 = H, R1R2 = CH2OCH2O, R2 = SO3Na; Z = p-C6H4, 4,4'-biphenylylene) are prepd. and are used to whiten cotton, polyamide and polyester fibers, PVC [9002-86-2], polystyrene [9003-53-6], and polyurethane coatings. Thus, a mixt. of 6-chloro-8-formyl-1,3-benzodioxin [63944-31-0], 4,4'-bis(dimethylphosphonomethyl)biphenyl [27344-43-0], and 2-NaO3SC6H4CHO [1008-72-6] in DMF was heated in the presence of NaOMe to give I (R = R1 = H, R2 = NaO3S, Z = 4,4'-biphenylylene) [63944-34-3].