Triethylamine hydrochloride → 2-(4-Nitro-phenyl)-5-[3-(2H-tetrazol-5-yl)-propyl]-4-thioxo-4,5-dihydro-1-oxa-3b,5-diaza-cyclopenta[a]pentalen-6-one

Participants

Reaction Steps

Sodium azide (76 mg, 1.17 mmol) and triethylamine hydrochloride (161 mg, 1.17 mmol) are added to a solution of Compound 35 (462.5 mg, 1.25 mmol) dissolved in DME (15 ml) and the suspension is refluxed for 48 hours. The mixture is then cooled to room temperature and the solvent is removed under reduced pressure. Water (30 ml) and ethyl acetate (30 ml) are added thereto and the aqueous phase is extracted three more times with ethyl acetate. The combined organic extracts are dried over Na2SO4 and the solvent is evaporated under reduced pressure. The crude product is recrystallized from ethanol to give Compound 36.

Provenance & Evidence