Acetonitrile → 4-[[N-(2-amino-5-trifluoromethylbenzoyl)glycyl]aminomethyl]-1-(2-amino-4-chlorobenzyl)piperidine

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-[{N-(2-amino-5-trifluoromethylbenzoyl)glycyl}aminomethyl]piperidine (0.050 mmol), 4-chloro-2-nitrobenzyl chloride (0.050 mmol), piperidinomethylpolystyrene (60 mg), acetonitrile (1.0 mL) and chloroform (0.7 mL) was stirred overnight at 50° C. The reaction mixture was cooled, loaded onto Variant™ SCX column and washed with 50% CHCl3/CH3OH (10 mL) and CH3OH (10 mL). Product was eluted using 2 N NH3 in CH3OH (5 mL) and concentrated. To the resulting material was added ethanol (3 mL) and 10% Pd—C (15 mg), and the mixture was stirred under H2 at room temperature for 1.5 h. Filtration, concentration, and preparative TLC afforded 4-[{N-(2-amino-5-trifluoromethylbenzoyl)glycyl}aminomethyl]-1-(2-amino-4-chlorobenzyl)piperidine (Compound No. 1919) (5.1 mg, 14%): The purity was determined by RPLC/MS (90%); 1H NMR (400 MHz, CDCl3) δ1.09-1.32 (m, 4H), 1.41-1.59 (m, 1H), 1.66 (d, J=12.5 Hz, 2H), 1.88 (t, J=11.5 Hz, 2H), 2.82 (d, J=11.5 Hz, 2H), 3.17 (t, J=6.5 Hz, 2H), 3.42 (s, 2H), 4.05 (d, J=5.5 Hz, 2H), 4.85 (br s, 1H), 5.92 (br s, 2H), 6.25-6.36 (m, 1H), 6.55-6.66 (m, 1H), 6.70 (d, J=8.5 Hz, 1H), 6.85 (d, J=8.5 Hz, 1H), 7.26 (s, 1H), 7.42 (d, J=8.5 Hz, 1H), 7.68 (s, 1H); ESI/MS m/e 498.2 (M++H, C23H27ClF3N5O3).

Provenance & Evidence