Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Indigo Sandmeyer synthesis

Indole-2,3-dione (isatin), red crystals, mp 204°C, is formed inter alia (cf p. 146) by the oxidation of indigo. A generally applicable synthesis of isatins 126 is the Sandmeyer synthesis, in which isonitrosoacetanilides 125 (easily accessible from primary arylamines, chloral hydrate, and hydroxylamine hydrochloride) are cyclized in acidic medium [195] ... [Pg.145]

Although the Sandmeyer indigo synthesis is no longer used, it is such an interesting example of the combined efforts of science and in-... [Pg.177]

The reaction product obtained from diphenylcarbodiimide and hydrogen cyanide is an intermediate in Sandmeyers indigo synthesis. HCN can also be eliminated from a-aminocarboxylic acid nitriles 589 to give l-cyano-N,N -disubstituted formamidines 590 and imines 591. ... [Pg.103]

Shibata, R. N. Okuyama, M. Okamura, K. Sandmeyer s indigo synthesis. Kogyo Kagaku Zasshi 1933, 36, 569-571 Chem. Abstr. 1934, 28, 3609. [Pg.240]

See other pages where Indigo Sandmeyer synthesis is mentioned: [Pg.432]    [Pg.433]    [Pg.58]    [Pg.58]    [Pg.806]    [Pg.242]    [Pg.188]   
See also in sourсe #XX -- [ Pg.324 ]

See also in sourсe #XX -- [ Pg.324 ]



SEARCH



Indigo

Indigo, synthesis

Sandmeyer

© 2024 chempedia.info