Acetaldehyde → HCID 68761561, compound

Participants

Reaction Steps

To a solution of ethyl 3-{7-amino-2-[(2,4-dichlorophenyl)amino]-1H-benzimidazol-1-yl}propanoate (Reference Example 27; 214 mg, 0.544 mmol) in methanol (5.5 mL) and acetic acid (0.110 mL) was added acetaldehyde (0.204 mL, 3.27 mmol) at 0° C. The resultant mixture was stirred at 0° C. for 30 min. To the reaction mixture was added sodium acetoxyborohydride (692 mg, 3.27 mmol) at 0° C. After the resultant mixture was stirred at room temperature for 12 hr, the mixture was diluted with aqueous saturated sodium hydrogen carbonate and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography on NH-silica gel eluting with ethyl acetate to give the title compound as a solid (255 mg, 0.567 mmol, quant).

Provenance & Evidence