4-[[N-(2-amino-4,5-difluorobenzoyl)glycyl]aminomethyl]-1-(4-methyl-3-nitrobenzyl)piperidine → 4-[[N-(2-amino-4,5-difluorobenzoyl)glycyl]aminomethyl]-1-(3-amino-4-methylbenzyl)piperidine

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Reaction Steps

A mixture of 4-[{N-(2-amino-4,5-difluorobenzoyl)glycyl}aminomethyl]-1-(4-methyl-3-nitrobenzyl)piperidine prepared above, 5% palladium-activated carbon (15 mg), and methanol (2 mL) was stirred under a hydrogen atmosphere at room temperature for 4 h. The Pd catalyst was filtered off through Celite and the filtrate was concentrated. Preparative TLC (SiO2, ethyl acetate/MeOH=3/1) gave 4-[{N-(2-amino-4, 5-difluorobenzoyl)glycyl}aminomethyl]-1-(3-amino-4-methylbenzyl)piperidine (Compound No. 2114) (2.9 mg, 13%): The purity was determined by RPLC/MS (100%); ESI/MS m/e 446.1 (M++H, C23H29F2N5O2).

Provenance & Evidence