Ammonium Hydroxide → HCID 178461773, compound

Participants

Reaction Steps

The title compound was prepared according to Preparation 28 using ammonium hydroxide and (2R,3S)-3-[(tert-butoxycarbonyl)amino]-3-[5-(4-cyano-3-fluorophenyl)-1H-benzimidazol-2-yl]-2-methylpropanoic acid (Preparation 32). The residue was sonicated in DCM:cyclohexane 5:1 to afford the boc protected amide intermediate. The residue was dissolved in 4M HCl in dioxane and stirred at room temperature for 3 hours. The solvent was removed in vacuo and the residue dissolved in MeOH and passed through an SCX cartridge eluting first with MeOH followed by 3M NH3 in MeOH. The residue was purified using silica gel column chromatography eluting with DCM:MeOH:NH3 (90:10:0.5) to afford the title compound (55 mg, 71%).

Provenance & Evidence