Dimethylamine, hydrochloride → HCID 59847703, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 38.7 g (225 mmol) 3.4-difluoro-benzoic acid methyl ester (Apollo) and 600 ml dimethylsulphoxid were added 22.3 g (270 mmol) dimethylamine hydrochloride and 65.4 g (473 mmol) potassium carbonate. The reaction mixture was stirred for 5 h at 55° C. in an autoclave and was reduced with high vacuum rotation evaporator at 65° C. The residue was diluted with dichloromethane, washed twice with water. The combined water phases were extracted with dichloromethane. The combined dichloromethane phases were washed with diluted sodium hydrogen carbonate solution, dried with sodium sulphate and concentrated. The oily crude product 3a was obtained in 71% yield (31.5 g, 160.0 mmol) and was used for the next step without purification.

Provenance & Evidence