Ammonia → HCID 69291056, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 8.00 g (35.1 mmol) 3-(2,2-difluoro-benzo[1,3]dioxol-5-yl)-acrylic acid in 40 ml tetrahydrofuran and 0.4 ml N,N-dimethyl formamide, 3.86 ml (45.0 mmol) oxalyl chloride was added dropwise at 0° C. within 10 min. Stirring was continued at 0-5° C. for 30 min. and 2 h at room temperature thereafter. The resulting solution was cooled to 0-5° C. again and then added within 15 min. to 34 ml of an 25% aqueous solution of ammonia. After stirring for 30 min. the precipitated amide was collected, washed with water and dried at 40° C. in vacuo. 7.20 g (90%) 3-(2,2-Difluoro-benzo[1,3]dioxol-5-yl)-acrylamide were obtained.

Provenance & Evidence