Hydrochloric Acid → 2-(3,5-dichlorophenylamino)-1-((S)-3-aminopiperidin-1-yl)ethanone

Participants

Reaction Steps

To a solution of tert-butyl(S)-1-(2-(3,5-dichlorophenylamino)acetyl)piperidin-3-ylcarbamate (0.9 mg, 2.2 mmol) in 1,4-dioxane (5 mL) was added 4 N HCl in dioxane (10 mL) and the reaction mixture was stirred for 1 h. The reaction mixture was concentrated in vacuo and the resultant residue was dissolved in water and aqueous phase was adjusted to a pH 9 with sat. NaHCO3 and extracted with EtOAc (3×50 mL). The combined organic layer was dried over Na2SO4 and evaporated in vacuo to afford the titled intermediate (540 mg, 79%), which was used in the next step without purification. LCMS: m/z: [M+1]=302.

Provenance & Evidence