Hydrochloric Acid → HCID 86604761, compound

Participants

Reaction Steps

To a suspension of 3,4-diamino-N′-[1-{5-(3,4-dichlorophenyl)-4-hydroxythiophen-3-yl}ethylidene]-benzohydrazide (30 mg, 0.064 mmol, see the synthetic example 176) in tetrahydrofuran (3.0 mL) was added sodium tert-butoxide (12 mg, 0.13 mmol) and N,N′-carbonyl diimidazole (15 mg, 0.095 mmol). The reaction mixture turned clear orange and was stirred at room temperature for 16 hours, and then N,N′-carbonyl diimidazole (15 mg, 0.095 mmol) was added. The reaction mixture was stirred further for 12 hours, acidified with 1M aqueous HCl solution (0.7 mL) and concentrated under the reduced pressure. To the residue was added water (4 mL), then the precipitated solid was collected by filtration and dried by means of a vacuum pump to give the desired product as a pale yellow solid (yield 97%).

Provenance & Evidence