Reaction between Amines and Sodium 1,2-Napthoquinone-4-Sulfonate

THE RED PIGMENT OF THE ROOT OF THE BEET (BETA VULGARIS) AS A PYRROLE COMPOUNDa

“…The solid residue in the fusion tube was then acidified to drive out the remaining CO, into the CO, collecting flask. Methyl amine was identified using paper chromatography and determined colorimetrically by reaction with 1,2-naphthoquinone 4 sulfonate (3,12). The acidified residue was then extracted with 95% ethanol to remove the remaining breakdown products.…”