80054-71-3Relevant academic research and scientific papers
AZOBENZENE DERIVATIVE AND MANUFACTURING METHOD THEREFOR
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Paragraph 0131-0134, (2019/10/19)
PROBLEM TO BE SOLVED: To provide an azobenzene derivative useful as an intermediate of 2-substituted 4,4'-diaminoazobenzene used as a manufacturing raw material of a polyimide optical oriented film for liquid crystal display, and an effective manufacturing method therefor. SOLUTION: There is provided an azobenzene derivative represented by the general formula (1). R1 represents a hydrogen atom, an alkyl group which may be substituted, an acyl group which may be substituted and an alkoxycarbonyl group which may be substituted. R2 represents a hydrogen atom, an arylmethyl group which may be substituted, an alkali metal oxysulfonyl methyl group or an alkoxycarbonyl group which may be substituted. R3 is a nitro group, an arylmethylamino group which may be substituted, an alkali metal oxysulfonyl methylamino group, or an alkoxycarbonyl amino group which may be substituted. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT
Acid-Catalyzed Reaction of 2,2,2-Trifluorodiazoethane for Analysis of Functional Groups by 19F Nuclear Magnetic Resonance Spectrometry
Koller, K. L.,Dorn, H. C.
, p. 529 - 533 (2007/10/02)
The acid-catalyzed reactions of trifluorodiazoethane with alcohols, phenols, thiols, and carboxylic acids are reported.The yield data for these trifluoroethyl derivatives suggest a simple, and in many cases, quantitative method for introduction of a fluorine tagging group.The 19F chemical shifts indicate that most functional groups (e.g., phenols, alcohols, etc.) have fairly well resolved chemical shifts regions.In addition, paramagnetic shift reagents have been utilized to selectively differentiate carboxylic acids from other active hydrogen functional groups.
