Diethylamine → 1H-Indolamine

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반응 단계

Diethylamine (0.48 mL, 4.63 mmol, 3 eq) was added into the crude 5-(2-Methanesulfonyloxy-ethyl)-2-trifluoromethyl-1H-indole-3-carboxylic acid benzyl ester in dioxanes (20 mL) solution. The reaction mixture was heated to reflux overnight. After the solvent was removed, the residue was purified by gravity chromatography (SiO2, ethyl acetate-methanol-NH4OH) to yield the desire indole amine as pale yellow gel (20.0% yield). Elemental Analysis: C23H25F3N2O2.HCl: Calcd: C: 60.73; H: 5.76; N: 6.16. Found: C: 60.40; H: 5.83; N: 6.06. ESI-MS: m/z 419.73 (M+H)+.

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