Water → HCID 67210662, compound

Participants

Reaction Steps

[step 1] (E)-[2-(2-Propylbenzimidazol-1-yl)methyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylidene]acetic acid (130 mg, 0.31 mmol) obtained in Example 2 was dissolved in THF (1.5 mL), N,N′-carbonyldiimidazole (80 mg, 0.49 mmol) was added, and the mixture was stirred at room temperature for 10 min. Hydrazine monohydrate (60 μL, 1.24 mmol) was added to the reaction mixture, and the mixture was stirred at room temperature for 30 min. Water was added to the mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (chloroform/methanol=90/10) to give (E)-[2-(2-propylbenzimidazol-1-yl)methyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylidene]acetohydrazide (172 mg) quantitatively.

Provenance & Evidence