Methanol → benzyl 3-[1-(2-aminoethyl)-7-bromo-3-methyl-1H-indol-6-ylmethoxy]-4-{4-[3-(2-methoxybenzyloxy)propoxy]phenyl}piperidine-1-carboxylate

Beteiligte Stoffe

Reaktionsschritte

The solution of 0.240 g of benzyl 3-(7-bromo-1-cyanomethyl-3-methyl-1H-indol-6-ylmethoxy)-4-{4-[3-(2-methoxybenzyloxy)propoxy]phenyl}piperidine-1-carboxylate in 1.5 ml of tetrahydrofuran is cooled to 0° C. with stirring and admixed with 1.22 ml of diborane (1M in tetrahydrofuran). The reaction mixture is stirred at 0° C. over 1 hour and subsequently admixed cautiously with 1.0 ml of methanol and concentrated by evaporation. The title compound is obtained as a yellow oil from the residue by means of flash chromatography (SiO2 60F). Rf=0.46 (200:20:1 dichloromethane-methanol-conc. ammonia); Rt=5.45.

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