Sodium hydride → (1R,2S)-2-(4-chlorophenyl)-1'-((tetrahydro-2 H-pyran-4-yl)methyl)spiro[cyclopropane-1,3'-indolin]-2'-one

Participants

Reaction Steps

Racemic (1S,2R)-2-(4-chlorophenyl)spiro[cyclopropane-1,3′-indolin]-2′-one and (1R,2S)-2-(4-chlorophenyl)spiro[cyclopropane-1,3′-indolin]-2′-one (270 mg, 1.0 mmol, 1.0 equiv.) were added to a stirred solution of sodium hydride (60%, 60 mg, 1.5 mmol) in 5 mL of DMF under argon atmosphere at 0° C. After stirring for 1 hour, 4-bromomethyl-tetrahydropyran (215 mg, 1.2 mmol) was added. The reaction mixture was stirred for 14 hours at room temperature. The crude product was purified by HPLC to give the title compound as a white solid (258 mg, 70%). LC/MS m/e calcd. for C22H22ClNO2: 367, observed (M+H)+: 368.2 1H NMR (400 MHz, MeOD-d4) δppm 1.39-1.55 (m, 2 H) 1.65 (dd, J=13.14, 1.77 Hz, 2 H) 2.11-2.25 (m, 3 H) 3.22 (t, J=8.46 Hz, 1 H) 3.37-3.47 (m, 2 H) 3.79 (d, J=7.33 Hz, 2 H) 3.94-4.04 (m, 2 H) 6.09 (d, J=7.58 Hz, 1 H) 6.76 (t, J=7.58 Hz, 1 H) 7.11 (d, J=7.83 Hz, 1 H) 7.17-7.25 (m, 3 H) 7.33 (d, J=8.34 Hz, 2 H). MS calcd. For C22H22ClNO2 367, obsd. (ESI+) [(M+H)+] 368.

Provenance & Evidence