Hydrochloric Acid → Ethyl 2-(4-cyano-2-methoxyphenyl)-3-(dimethylamino)acrylate

Participants

Reaction Conditions

Reaction Steps

Combined tert-butyl 2-(4-cyano-2-methoxyphenyl)acetate (549 mg, 2.218 mmol) and 4N HCl in dioxane (0.277 mL, 1.109 mmol) in ethanol (7.4 mL) and stirred for 16 hours at 60° C. The reaction was concentrated by rotary evaporation and then combined with ethyl 2-(4-cyano-2-methoxyphenyl)acetate (0.486 g, 2.217 mmol) and 1,1-diethoxy-N,N-dimethylmethanamine (1.9 mL, 11.08 mmol) in DMF (4.43 mL) and stirred for 16 hours at 100° C. The reaction mixture was diluted with 200 mL EtOAc and washed twice with 200 mL water. Organic layer was dried with sodium sulfate and concentrated to give a residue which was purified on a 60 g NH silica gel column eluting with hexanes and EtOAc to give the title compound (405 mg, 74%).

Provenance & Evidence