METHOD FOR PREPARING INDIGO OR A SUBSTITUTED DERIVATIVE THEREOF
Application
US20260085042A1
Kind: A1
Mar 26, 2026
Inventors
Filipe GOMES, Océane CHEVRON, Kevin COTTET, Guillaume BOISSONNAT, Debora VILONA, Cyril BOSSET, Vivien HENRYON
Abstract
A method for the synthesis of dyes is described. More particularly, a method is described for preparing indigo, optionally substituted, that includes reacting anthranilic acid, optionally substituted, with glyoxylic acid under hydrogenation in the presence of a metal catalyst in a solvent, to obtain 2-(carboxymethylamino)benzoic acid, optionally substituted, and conversion of the latter to indigo, optionally substituted.
CPC Classifications
C07D 209/36
Filing Date
2023-06-16
Application No.
18875479