4-Chloro-3-nitrobenzaldehyde → 8-(4-chloro-3-nitrophenyl)-2,3,4,5,6,8-hexahydro-7H-cyclopenta[b]thieno[2,3-e]pyridin-7-one 1,1-dioxide

Participants

Reaction Steps

A solution of tetrahydrothiophene-3-oxo-1,1-dioxide (171 mg, 1.28 mmol), 4-chloro-3-nitrobenzaldehyde (210 mg, 1.13 mmol) and 3-amino-2-cyclopenten-1-one (110 mg, 1.13 mmol) in ethanol (3 mL) was heated to reflux for 24 hours and cooled. The precipitate was collected, washed with ethanol, dried and recrystallized from methanol/ chloroform to provide the title compound.

Provenance & Evidence