Pyrogallol → HCID 53810867, compound

Participants

Reaction Steps

31.4 g of N-(3-chloro-4-cyano-5-dimethylamino-2-aza-2,4-pentadienylidene)-N,N-dimethyl ammonium perchlorate and 0.1 g of pyrogallol are stirred in a mixture of 140 ml of water and 200 ml of ethanol for one hour at 25° to 30° C. Precipitaion of reaction products is completed by addition of 500 g of ice. Vacuum filtration is then carried out. This is followed by washing with cold water. Drying is effected at 20°C over P2O5. 13.2 g (71.2%) of 3-chloro-5-dimethylamino-2-formyl-4-aza-2,4-pentadienenitrile, with a melting point of 145° to 147°C (with decomposition), are thus obtained in the form of pale needles.

Provenance & Evidence