Triethylamine → HCID 14099148, compound

Participants

Reaction Conditions

Reaction Steps

A stirred suspension of 2.0 grams (0.012 mole) of 4-amino-5,6-dichloropyridazine in 75 ml of tetrahydrofuran is cooled to 0° C. and 1.5 grams (0.015 mole) of triethylamine is added in one portion. A solution of 2.3 grams (0.015 mole) of phenyl chloroformate in tetrahydrofuran is added dropwise during a 30 minute period. Upon completion of addition the reaction mixture is allowed to warm to ambient temperature where it is stirred for three days. The reaction mixture is taken up in 500 ml of chloroform and filtered to collect 0.98 gram of phenyl N-(5,6-dichloro-4-pyridazinyl)carbamate. The filtrate is concentrated under reduced pressure to a residue. The residue is subjected to column chromatography on silica gel to yield an additional 0.9 gram of phenyl N-(5,6-dichloro-4-pyridazinyl)carbamate.

Provenance & Evidence