Abstract The reaction whereby aldose or ketose precursors are converted in acidified aqueous ethanol in the presence of p-toluidine into 3-deoxyaldos-2-uloses and the latter are trapped as the crystalline bis (benzoylhydrazones) is shown to be of wide generality. Sugar precursors having four-, five-, six-, and seven-carbon chains, and aroylhydrazines having the p-toluoyl, p-anisoyl, p-chlorobenzoyl, p-iodobenzoyl, or p-nitrobenzoyl groups, all ...
![4-chloro-N-[[(1Z)-1-[(4-chlorobenzoyl)hydrazinylidene]-4,5,6-trihydroxy-hexan-2-ylidene]amino]benzamide Structure](https://image.chemsrc.com/caspic/247/35812-92-1.png)