Methyl iodide → 1,8-Diethyl-1-(2-methoxyethyl)-1,3,4,9-tetrahydropyrano[3,4-b]indole

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Reaction Steps

To a solution of compound 1 (348 mg, 1.27 mmol) in dry THF (5 mL) under argon, 60% NaH in mineral oil (64 mg, 1.59 mmol, 1.25 eq) was added in a portion-wise manner. After stirring for thirty minutes, MeI (99 μL, 1.59 mmol, 1.25 eq) was added dropwise, and the reaction was stirred for 2 days at room temperature. The resulting mixture was diluted with brine and extracted three times with Et2O. The combined organic phases were dried with Na2SO4, concentrated, and purified by column chromatography using 20:80:EtOAc:Hexane to give a yellow-white solid (228 mg, 62%): mp 125-126° C. 1HNMR (CDCl3, δ TMS): 0.86 (t, 3H), 1.37 (t, 3H), 1.94 (m, 2H), 2.15 (m, 2H), 2.78 (t, 2H), 2.85 (q, 2H), 3.37 (s, 3H), 3.52 (m, 2H), 4.00 (m, 2H), 6.99-7.38 (m, 3H, Ar—H), 8.43 (br, 1H, NH). MS−: m/z 286 ([M−H]−). Anal. (C18H25NO2): C, H, N.

Provenance & Evidence