Aluminium lithium hydride → dibenzyl-[2-(5,7-difluoro-1H-indol-3-yl)-1(S)-methyl-ethyl]-amine

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Reaction Steps

Lithium aluminum hydride (LAH) (0.7 g, 18 mmol) is added portionwise to a dioxane/tetrahydrofuran (90 ml/10 ml) solution of 2-(N,N-dibenzylamino)-1-(1-benzenesulfonyl-5,7-difluoro-1H-indol-3-yl)-propan-1-ol (1.9 g, 3.3 mmol) under N2 at 0° C. After the addition is complete, the reaction is allowed to warm to room temperature, then is refluxed for 1 hour. The reaction is quenched with H2O and 15% aqueous NaOH, filtered, and the filtrate is diluted with ethyl acetate, washed with brine, dried (Na2SO4), filtered, concentrated, and the residue is purified by flash chromatography (SiO2, ethyl acetate/hexane gradient) to yield 1.2 g of dibenzyl-[2-(5,7-difluoro-1H-indol-3-yl)-l(S)-methyl-ethyl]-amine (86%).

Provenance & Evidence