Oxalyl chloride → HCID 19986228, compound

Participants

Reaction Steps

To a solution of dry (0.1 mmHg at 80° C.) 3,3-bis(4-fluorophenyl)-2-(1-methyl-1H-tetrazol-5-yl)2-propenoic acid 3.8 g (11.0 mmoles) in 20 mL of dry methylene chloride was added 4 mL (46.0 mmoles) of purified oxalyl chloride (redistilled over CaH2) in one single portion. The reaction mixture was warmed gradually to reflux temperature for two hours. The mixture was evaporated under reduced pressure to remove volatile solvent, then excess oxalyl chloride was removed under vacuum (20 mmHg) at ambient temperature for 2 hours and under high vacuum (0.1 mmHg) at 50° C. for 16 hours to give the title compound.

Provenance & Evidence