Dimethylacetamide → tert-butyl 1-(4-(8-cyano-4-oxo-2-phenyl-4H-pyrano[2,3-c]pyridin-3-yl)phenyl)cyclobutylcarbamate

Participants

Reaction Conditions

Reaction Steps

tert-Butyl (1-(4-(8-chloro-4-oxo-2-phenyl-4H-pyrano[2,3-c]pyridin-3-yl)phenyl)cyclobutyl)carbamate (50 mg, 0.1 mmol), zinc (II) cyanide (38 mg, 0.058 mmol) and binaphthyl-di-tert-butyl phosphine (4 mg, 0.01 mmol), palladium(II) trifluoroacetate (4 mg, 0.01 mmol), zinc dust (2 mg) were suspended in DMA (1 mL) in a microwave vial. The vial was sealed, evacuated and flushed twice with nitrogen. The reaction mixture was heated at 95° C. for 18 h. The resulting mixture was allowed to cool to RT, partitioned between ethyl acetate (40 mL) and water (20 mL) and the phases were separated. The organic layer was washed with brine (2 mL), dried (Na2SO4), filtered and concentrated in vacuo. The resulting residue was subjected to flash chromatography (SiO2, 50% ethyl acetate in cyclohexane) to afford the title compound (30 mg, 61%). LCMS (Method I): RT=7.63 min, [M+H]+=438 (-tBu), [M+Na]+=516.

Provenance & Evidence