Methanol → HCID 178468683, compound

Participants

Reaction Steps

After adding 3,5-dichloro-2-hydroxybenzaldehyde (0.3 mmol) and sodium triacetoxyborohydride (0.3 mmol) to a solution of 2-[(piperidin-4-ylmethyl)-amino]-1H-benzimidazole-5-carboxylic acid ethyl ester (0.1 mmol) in dimethylformamide-acetic acid (10:1) (1.0 ml), the mixture was stirred at room temperature overnight. Methanol (1.0 ml) was added to the reaction mixture to suspend the reaction, and after stirring for 1 hour, the solution was passed through SCX (Bond Elute SCX500MG). The SCX was washed with methanol and then with a mixed solution of chloroform/methanol (1/1), and elution was performed with a 0.5N ammonia-dioxane solution. The solvent was distilled off under reduced pressure, and the obtained residue was subjected to preparative HPLC to obtain 2-{[1-(3,5-dichloro-2-hydroxybenzyl)-piperidin-4-ylmethyl]-amino}-1H-benzimidazole-5-carboxylic acid ethyl ester. The compound was identified by LC-MS.

Provenance & Evidence