Acetic Acid → 6-Phenyl-4,7-dihydro-1-thia-4,5-diaza-cyclopenta[a]pentalene

Participants

Reaction Conditions

Reaction Steps

5-Benzoyl-5,6-dihydro-cyclopenta[b]thiophen-4-one (2.42 g, 10.0 mmol), hydrazine monohydrate (1.92 mL, 60 mmol), glacial acetic acid (2.7 mL) and ethanol (15 mL) was heated at 100° C. under nitrogen for 4 hr. The mixture was cooled to 25° C. and concentrated under reduced pressure to give a solid which was recrystallized from ethanol to provide the corresponding 6-Phenyl-4,7-dihydro-1-thia-4,5-diaza-cyclopenta[a]pentalene (2.4 g, 8.0 mmol) as white solid in 80% yield.

Provenance & Evidence