Hydrochloric Acid → 4-[[N-(2-amino-4,5-difluorobenzoyl)glycyl]aminomethyl]-1-(3-amino-4-hydroxybenzyl)piperidine

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Reaction Steps

To a solution of 1-(3-amino-4-hydroxybenzyl)-4-[{N-(2-(tert-butoxycarbonylamino)-4,5-difluorobenzoyl)glycyl}aminomethyl]piperidine (20.0 mg, 0.035 mmol) in methanol (1 mL) was added 4 N HCl in dioxane (0.50 mL) and the solution was stirred at room temperature overnight. After the solution was concentrated, the residue was dissolved in methanol, loaded onto Varian™ SCX column, washed with CH3OH (5 mL×2), and eluted off using 2 N NH, in CH3OH (5 mL). Concentration afforded 4-[{N-(2-amino-4,5-difluorobenzoyl)glycyl}aminomethyl]-1-(3-amino-4-hydroxybenzyl)piperidine (Compound No. 2141) (17.6 mg, quant.): The purity was determined by RPLC/MS (85%); ESI/MS m/e 448.3 (M++H, C22H27F2N5O3).

Provenance & Evidence