Thionyl Chloride → HCID 13389345, compound

Participants

Reaction Steps

A solution of 6 g of ethyl 6-chloro-4-hydroxy-3-cinnolin carboxylate in 300 cm3 of thionyl chloride and 1 cm3 of dimethyl formamide was stirred for 16 hours at reflux and the thionyl chloride was concentrated under reduced pressure. The residue was taken up several times in 50 ml of toluene to obtain 6 g of ethyl 4,6-dichloro-3-cinnolin carboxylate as a greenish residue melting at ≈50° C.

Provenance & Evidence