Ethyl Acetate → 1h-Indazole-6-methanamine,1-(tetrahydro-2h-pyran-2-yl)-

Participants

Reaction Conditions

Reaction Steps

A solution of LiAlH4 (9 mL, 9 mmol, 1.0 M) in THF was added dropwise to a yellow solution of 6-(azidomethyl)-1-(2-tetrahydropyranyl)indazole (2.4 g, 9 mmol) (4-7) in THF (30 mL) at 0° C. The addition time was 10 minutes, and gas came out. After stirring at 0° C. for 1 hour, NaOH (1.0 m, 1.5 mL) was added. The reaction mixture was allowed to warm to room temperature. Ethyl acetate (100 mL) was added, and the suspension was filtered through (Celite). The filter cake was washed with an addition portion of ethyl acetate (40 mL). Combined organic layers were evaporated under vacuum to five essentially pure amine (2.1 g, 97%). MS (electrospray) 232.5 (M+1); 1H NMR (CDCl3) δ 1.67 (m, 3H), 2.01 (m, 2H), 2.48 (m, 1H), 3.85 (m, 1H), 3.94 (m, 1H), 5.75 (d, 1H, J=9.4 Hz), 7.14 (d, 1H, J=8.4 Hz), 7.62 (s, 1H), 7.62 (d, 1H, J=8.4 Hz), 7.93 (s, 1H).

Provenance & Evidence