Detail of "621-95-4"

Reference

Sulfonic acid group-free bis(cationic) symmetric and asymmetric dis- and trisazo compounds

Sulfonic acid group-free bis(cationic) symmetric and asymmetric dis- and trisazo compounds. Greve, Manfred; Moser, Helmut (Sandoz-Patent-G.m.b.H., Ger.Some commonly used reagents like 62073-65-8 and 62073-64-7 are used in this experiment.). Ger. Offen. DE 2627680 20 Jan 1977, 56 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B035-18. PRIORITY: CH 75-8466 30 Jun 1975. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Disazo dye I(Z = CH2CH2) [62073-66-9] and disazo dye I(Z= CH2) [62073-65-8] were prepd. and used to dye paper and acrylic fibers fast yellow shades. Thus, 4,4'-diaminobibenzyl [621-95-4] was tetrazotized and coupled with 3-pyridinio-4-methyl-6-hydroxy-2-pyridone chloride [62073-64-7] to give I(Z = CH2CH2). .

Catalytic reduction of nitro compounds

Catalytic reduction of nitro compounds. Yukel'son, I. I.; Butenko, T. R. (Voronezh. Tekhnol. Inst., Voronezh, USSR). Deposited Doc., VINITI 56-74, 6 pp. Avail.Several reagents with their cas registry numbers 7440-02-0 and 7429-90-5 are used here. BLLD (Russian) 1974. DOCUMENT TYPE: Report CA Section: 35 (Synthetic High Polymers) Section cross-reference(s): 25 The optimum conditions for redn. of 4,4'-dinitrodiphenylmethane (I) [1817-74-9] and 1,2-bis(4-nitrophenyl)ethane (II) [736-30-1] to the corresponding amines on a Ni-Ti-Al catalyst (I. I. Yukel'son et al., 1971) were established by the method of expt. planning. The yield of the amines was used as the optimization criterion, and temp., concn. of I and II, and the duration of the reaction were selected as the variables. A quant. yield of 1,2-bis(4-aminophenyl)ethane [621-95-4] was obtained in 1.5 h. II was more reactive than I. .