Diisopropylethylamine → Methyl 3-(4-{[4-(4-{[3-(3,3-dimethyl-1-piperidinyl)propyl]oxy}phenyl)-1-piperidinyl]carbonyl}-1-naphthalenyl)propanoate

Participants

Reaction Steps

A solution of 4-[3-(methyloxy)-3-oxopropyl]-1-naphthalenecarboxylic acid (for example as prepared for Intermediate 6) (0.197 g, 0.76 mmol) in anhydrous DMF (2 ml) was treated with HBTU (0.29 g 0.77 mmol), diisopropylethylamine (0.6 ml, 3.82 mmol), the mixture was stirred at room temperature for 20 minutes, 3,3-dimethyl-1-(3-{[4-(4-piperidinyl)phenyl]oxy}propyl)piperidine dihydrochloride (for example as prepared for Intermediate 4) (250 mg, 0.63 mmol) was added and the mixture stirred at room temperature for 4 h. The mixture was evaporated to dryness and purified on a SCX-2 cartridge (5 g) eluting with MeOH, followed by 2M ammonia solution in methanol to afford the title compound (238 mg). LCMS RT=2.79 min, ES+ve m/z 571.

Provenance & Evidence