Hydrochloric Acid → HCID 178527939, Verbindung

Beteiligte Stoffe

Reaktionsschritte

A suspension of 1H-indazole-5-carbohydrazide (4.40 g, 25.0 mmol), carbon disulfide (3.76 mL, 62.5 mmol) and triethylamine (4.18 mL, 30.0 mmol) in ethanol (100 mL) was heated under reflux for 7 hr. After cooling, the reaction mixture was poured into water, and acidified with 1M hydrochloric acid. The precipitate was collected by filtration, dried and recrystallized from tetrahydrofuran to give the title compound (5.27 g, yield 97%) as colorless crystals.

Herkunft & Nachweise