Sulfuric Acid → 5-([1,1'-biphenyl]-4-yl)-2-(((3R,3aR,6R,6aR)-6-hydroxyhexahydrofuro[3,2-b]furan-3-yl)oxy)-1H-imidazo[4,5-b]pyridine-6-carbonitrile

Participants

Reaction Conditions

Reaction Steps

A mixture of PdOAc2 (15.48 mg, 0.069 mmol) and 1,1′-bis(di-tert-butylphoshino)ferrocene (32.7 mg, 0.069 mmol) in DMAc (0.25 ml) was treated with sulfuric acid (6.76 mg, 0.069 mmol) and stirred at 80° C. for 30 min. Then a solution of (3R,3aR,6R,6aR)-6-((5-([1,1′-biphenyl]-4-yl)-6-chloro-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-imidazo[4,5-b]pyridin-2-yl)oxy)hexahydrofuro[3,2-b]furan-3-ol (Intermediate 8, 40 mg, 0.069 mmol) and dicyanozinc (9.71 mg, 0.083 mmol) in DMAc (0.25 ml) was added to the reaction and the reaction was heated to 120 degrees for 16 h. The residue was diluted with 0.7 ml DMF, filtered and purified by mass directed reverse phase column chromatography eluting with acetonitrile/water+0.1% TFA to give the title compound. LC-MS: calculated for C25H20N4O4, 440.15, observed m/e: 441.15 (M+H)+ (RT 0.58/2.00 min).

Provenance & Evidence