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

Participants

Reaction Steps

A 4 M dioxane solution of HCl (0.50 mL) was added to a methanol (1 mL) solution of the 1-(3-acetylamino-4-hydroxybenzyl)-4-[[N-(2-(tert-butoxycarbonylamino)-4,5-difluorobenzoyl)glycyl]aminomethyl]piperidine obtained above, and the resulting solution was stirred at room temperature overnight and concentrated. The resulting residue was then dissolved in methanol, loaded onto a Varian™ SCX column, washed with methanol (5 mL×2), eluted with a 2 M methanol solution of NH3 (5 mL), concentrated and then purified by preparative TLC (SiO2, ethyl acetate/methanol=3:2) to thereby afford 1-(3-acetylamino-4-hydroxybenzyl)-4-[[N-(2-amino-4,5-difluorobenzoyl)glycyl]aminomethyl]piperidine (Compd. No. 2148) (2.3 mg, 9.2%). The purity was determined by RPLC/MS (98%). ESI/MS m/e 490.3 (M++H, C24H29F2N5O4).

Provenance & Evidence