3272. 2,4-Dinitrobenzaldehyde

Nomenclature

CAS number: 528-75-6
C7H4N2O5; mol wt 196.12.
C 42.87%, H 2.06%, N 14.28%, O 40.79%.

Description and references

Prepn: p-Nitrosodimethylaniline hydrochloride, obtained by reacting dimethylaniline and sodium nitrite, is condensed with 2,4-dinitrotoluene in the presence of sodium carbonate. The product, dinitrobenzylidene-p-aminodimethylaniline is split under steam agitation with HCl: Bennett, Bell, Org. Synth. coll. vol. II, 223 (1943).

Chemical structure

Properties

Yellow to light brown crystals, mp 72°. bp10-20 190-210°. Freely sol in alc, ether, benzene, slightly sol in petr ether, water.

Use

In prepn of Schiff bases.