反应详情

To a solution of potassium tert-butoxide (0.269 g; 2.4 mmol) in dry tert-butanol (10 mL) under a nitrogen atmosphere at 50° C. were added (2-amino-4,5,6,7-tetrahydrobenzo[b]thiophen-3-yl)(p-tolyl)methanone (0.542 g; 2 mmol) and diethyl succinate (0.464 mL; 2.8 mmol). The mixture was heated at reflux for 24 h and then cooled down to room temperature. Water (8 ml) was added and then the reaction mixture was acidified with a solution of hydrochloric acid 1N until pH 1. The aqueous layer was extracted with diisopropylether (3×10 ml) and ethyl acetate (3×10 mL). The organics were combined and the volatiles were removed under reduced pressure. The remaining crude was crystallized from acetic acid to furnish 0.101 g (14%) of the title compound.

1. temperatureThe mixture was heated
2. temperatureat reflux for 24 h
3. extractionThe aqueous layer was extracted with diisopropylether (3×10 ml) and ethyl acetate (3×10 mL)
4. customthe volatiles were removed under reduced pressure
5. customThe remaining crude was crystallized from acetic acid