Sulfuric acid magnesium salt (1:1) → 1-(7-Aza-bicyclo[2.2.1]hept-7-yl)-2-{2-(3,5-dimethylphenyl)-3-[2-(2-pyridin-3-yl-ethylamino)-ethyl]-1H-indol-5-yl)-2-methylpropan-1-one

関与物質

反応手順

To a solution of 2-[3-(2-aminoethyl)-2-(3,5-dimethylphenyl)-1H-indol-5-yl]-1-(7-aza-bicyclo[2.2.1]hept-7-yl)-2-methylpropan-1-one (183 mg in 10 mL dry chloroform) at 0° C. was added 305 mg magnesium sulfate followed by a solution of 100 mg pyridin-3-yl-acetaldehyde in 1.0 mL chloroform and the mixture stirred at low temperature. After 6 minutes, a solution of 52 mg sodium cyanoborohydride in 0.80 mL methanol was added and the pH djusted to pH6 by the addition of 10% acetic acid in methanol. After 30 minutes, the reaction was quenched by the addition of saturated sodium bicarbonate and the mixture extracted with ethyl acetate. The organic portion was washed successively with saturated ammonium chloride, sodium bicarbonate and brine, then dried over sodium sulfate. Purification of the concentrate by flash chromatography on silica gel (methylene chloride:methanol, 93:7; then 88:12) gave the title compound (118 mg).

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