Water → HCID 66719106, compound

Participants

Reaction Conditions

Reaction Steps

5-Bromo-1-(2-chloroethyl)-1H-indazole (183 mg, 0.703 mmol) was added to a suspension of (1S,4S)-(+)-5-aza-2-oxabicyclo[2.2.1]heptane hydrochloride (286 mg, 2.11 mmol), K2CO3 (485 mg, 3.52 mmol) and KI (117 mg, 0.703 mmol) in DMF (10 mL) under N2. The resulting suspension was stirred at 90° C. for 19 h. The suspension was cooled, and H2O (10 mL) was added. The aqueous solution was extracted with EtOAc, and the combined organic extracts were washed with brine. The organic solution was dried over Na2SO4 and concentrated under reduced pressure to afford clear viscous oil. Flash chromatography on silica gel (100:0 to 0:100 hexanes/(9:0.9:0.1 CH2Cl2/MeOH/NH4OH)) gave the title compound (88 mg, 39%) as a clear oil: 1H NMR (300 MHz, CDCl3) δ 7.95-7.92 (m, 1H), 7.87-7.84 (m, 1H), 7.45 (dd, J=8.7, 1.8 Hz, 1H), 7.34 (d, J=8.7 Hz, 1H), 4.43 (t, J=6.7 Hz, 2H), 4.34 (br s, 1H), 3.92 (d, J=7.8 Hz, 1H), 3.56 (dd, J=7.8, 1.5 Hz, 1H), 3.34 (br s, 1H), 3.15-3.01 (m, 2H), 2.92 (d, J=21.9 Hz, 1H), 2.81 (dd, J=9.9, 1.5 Hz, 1H), 2.47 (br d, J=9.9 Hz, 1H), 1.79-1.60 (m, 1H).

Provenance & Evidence