HCID 66793182, compound → HCID 86663366, compound

Participants

Reaction Steps

A 500 mL three-necked round bottom flask was charged with 3-(1-(tetrahydro-2H-pyran-2-yl) -1H-indazol-5-yl)prop-2-yn-1-ol (11.4 g, 44.2 mmol; Intermediate 16), dichloromethane (300 mL) and MnO2 (38.4 g, 442 mmol). The resulting mixture was stirred at room temperature for 16 hours. Upon completion, the reaction mixture was filtered. The filtrate was dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by column chromatography on silica gel (1:100-1:20 EtOAc/petroleum ether) affording the title compound (6.4 g). 1H NMR (400 MHz, DMSO-d6): δ 9.45 (s, 1H), 8.27-8.25 (m, 2H), 7.87 (d, 1H), 7.66 (dd, 1H), 5.86 (dd, 1H), 3.91-3.87 (m, 1H), 3.79-3.72 (m, 1H), 2.40-2.36 (m, 1H), 2.05-1.96 (m, 2H), 1.78-1.72 (m, 1H), 1.61-1.56 (m, 2H); LCMS: 255 (M+H)+.

Provenance & Evidence