Acetic Anhydride → HCID 54432745, compound

Participants

Reaction Steps

2.0 ml of acetic anhydride were added to 30.6 g (119 mmol) of 2-amino-3-carboethoxy-4-methyl-5-dimethylcarbamoyl-thiophene in 150 ml of triethyl orthoformate, and the mixture was boiled under nitrogen and at reflux for 2 h. The mixture was then evaporated right down at 80° C. on a rotary evaporator. 35.6 g (96%) of crude product were isolated as a dark oil, which is sufficiently pure for further reaction.

Provenance & Evidence