Tetrahydro-4H-pyran-4-one → (R)-4-((R)-1-((3-methyl-6-(4-(4-(tetrahydro-2H-pyran-4-yl)piperazin-1-yl)phenyl)-3H-imidazo[4,5-c]pyridin-4-yl)oxy)ethyl)pyrrolidin-2-one

Participants

Reaction Steps

A mixture of (R)-4-((R)-1-(3-methyl-6-(4-(piperazin-1-yl)phenyl)-3H-imidazo[4,5-c]pyridin-4-yloxy)ethyl)pyrrolidin-2-one 3A.13 (44.0 mg, 0.105 mmol), 4-oxotetrahydropyran (37.7 mg, 0.366 mmol) and sodium triacetoxyborohydride (100 mg, 0.471 mmol) in 1,2-dichloroethane (1.0 mL) was stirred at room temperature over the weekend. The reaction was diluted with saturated NaHCO3 (aq) and methanol. The mixture was concentrated to dryness and the residue was purified via prep HPLC (2-95% acetonitrile in water, 0.1% trifluoroacetic acid buffer) to isolate (R)-4-((R)-1-((3-methyl-6-(4-(4-(tetrahydro-2H-pyran-4-yl)piperazin-1-yl)phenyl)-3H-imidazo[4,5-c]pyridin-4-yl)oxy)ethyl)pyrrolidin-2-one 3.34 (26 mg) as its trifluoroacetic acid salt.

Provenance & Evidence