Detail of "536-57-2"

Reference

Pyridylethylation - a new protection method for active hydrogen compounds

Pyridylethylation - a new protection method for active hydrogen compounds.Several substances are used for example 62237-49-4 and 536-57-2 which are their cas registry numbers. Katritzky, Alan R.; Khan, Ghulam R.; Schwarz, Otto A. (Dep. Chem., Univ. Florida, Gainesville, FL 32611, USA). Tetrahedron Lett., 25(12), 1223-6 (English) 1984. CODEN: TELEAY. ISSN: 0040-4039. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Section cross-reference(s): 27 RCOCl (R = Ph, PhCH2) were treated with R1CH2CH2OH (R1 = 2-pyridyl, 4-pyridyl) to give R1CH2CH2O2CR, which were activated with MeI and cleaved to form RCO2H and 1-methyl(vinyl)pyridinium iodides. 4-MeC6H4SH (I) underwent Michael reaction with R1CH:CH2 (R1 = 4-pyridyl) to give R1CH2CH2SC6H4Me-4 (II), which was oxidized to R1CH2CH2SO2C6H4Me-4 (III). Quaternization of II and III with MeI gave pyridinium salts, which were cleaved with K2CO3 to give I and 4-MeC6H4SO2H, resp. .

Method for processing silver halide color photographic material using sulfinate to improve solution stability

Method for processing silver halide color photographic material using sulfinate to improve solution stability. Ishikawa, Takatoshi (Fuji Photo Film Co Ltd, Japan). Jpn. Kokai Tokkyo Koho JP 09005965 A2 10 Jan 1997 Heisei, 46 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: G03C007-42. ICS: G03C001-00; G03C007-00. APPLICATION: JP 1995-175557 20 Jun 1995. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) Claimed method for processing exposed color photog. material comprising color development followed by desilvering with a bleach-fix is characterized by (1) that the bleach-fix soln. is agitated at the condition; 1.5 ￡ S/V ￡ 10, where S is recirculation rate (L/min) and V is tank vol. (L), and (2) that the bleach-fix soln. contains a sulfinate RSO2M where R is alkyl, cycloalkyl, aralkyl, alkynyl, and aryl; M is H, alkali metal atom, ammonium, and quaternary amine. 16574-29-1 and 536-57-2 which are cas registry numbers of chemicals are mentioned. The process is preferably applied to the material having magnetic recording backing layer. It reduces stain generation and improves magenta dye stability. Preferred sulfinates to be added to the bleach-fix soln. for color neg. processing are aniline-4-sulfinic acid, toluene-4-sulfinic acid, 1-isopropylbenzene-4-sulfinic acid, benzene-1,3-disulfinic acid, pentaflurobenzenesulfonic acid, etc. .