Dimethylformamide → N-[(6R)-6-[(benzyloxy)methyl]-8a-(5-cyano-2,4-difluorophenyl)-4,4a,5,6,8,8a-hexahydropyrano[3,4-d][1,3]thiazin-2-yl]benzamide

Participants

Reaction Conditions

Reaction Steps

C9 (300 mg, 0.511 mmol), zinc cyanide (72.0 mg, 0.613 mmol), tetrakis(triphenylphosphine)palladium(0) (342 mg, 0.296 mmol) and N,N-dimethylformamide (9 mL) were added to a 16 ml Emry microwave vial. The vial was sealed and purged with nitrogen for 10 minutes while stirring. The reaction was heated at 80° C. in a Biotage microwave for 120 minutes. The reaction mixture was partitioned between ethyl acetate (100 mL) and saturated aqueous sodium bicarbonate (200 mL). The organic was separated and the aqueous layer was extracted with ethyl acetate (3×50 mL). The combined organics were washed with brine (1×200 mL), dried over sodium sulfate, filtered, and absorbed on silica gel. The obtained solid after removal of solvent was subjected to silica gel chromatography (Gradient: 0% to 100% ethyl acetate in heptane) to provide the desired product as a yellow solid. Yield: 269 mg, 0.503 mmol, 98%. LCMS m/z 534.3 [M+H+].

Provenance & Evidence