Acetic Acid → 6-Pyridin-3-yl-4,7-dihydro-1-thia-4,5-diaza-cyclopenta[a]pentalene

Participants

Reaction Conditions

Reaction Steps

5-(Pyridine-3-carbonyl)-5,6-dihydro-cyclopenta[b]thiophen-4-one (1.23 g, 5 mmol), hydrazine monohydrate (0.38 mL, 7.5 mmol), glacial acetic acid (0.9 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-Pyridin-3-yl-4,7-dihydro-1-thia-4,5-diaza-cyclopenta[a]pentalene (0.5 g, 2 mmol) as white solid in 40% yield.

Provenance & Evidence