Ethanol → HCID 20094541, compound

Participants

Reaction Steps

Ethanol (0.8 ml), ion-exchanged water (0.2 ml), and potassium hydroxide (28 mg) were added to 2-butyl-4-chloro-1-[2-(2-ethoxycarbonylphenyl)-2H-indazol-5-yl]methyl-1H-imidazole-5-carbaldehyde (61 mg, 0.13 mmol) as obtained in Example 1, and the mixture was stirred at room temperature for 2 hours. The mixture was concentrated in an evaporator, and partitioned by ion-exchanged water (2.5 ml) and diethyl ether (5 ml). The water layer was separated and conc. hydrochloric acid was dropwise added thereto to adjust its pH to 1. The resultant solid was filtered off and washed three times with ion-exchanged water (1 ml). It was then dried in vacuo overnight at 37° C. to give 36 mg of 2-butyl-4-chloro-1-[2-(2-carboxyphenyl)-2H-indazol-5-yl]methyl-1H-imidazole-5-carbaldehyde.

Provenance & Evidence