4-(N,N-dimethlyamino)pyridine in dichloromethane T=20°C; 15 h;

in N,N-dimethyl-formamide

ammonium formate; palladium 10 on activated carbon in ethanol T=20°C; 1 h;

tri-isopropoxy-borane in tetrahydrofuran; n-heptane; ethylbenzene 2.41667 h; Cooling with ice;

hydrogenchloride; lithium diisopropyl amide in tetrahydrofuran; n-heptane; ethylbenzene addn. of boron compd. to a soln. of indole deriv. in THF, cooling to 0°C, dropwise addn. of Li salt in THF/heptane/ethylbenzene over 1 h,stirring for 30 min, addn. of 2 M HCl, stirring at room temp. for 10 mi n; sepn., extn. aq. layer with ethyl acetate, drying org layer with Na2SO4,filtration, evapn. in vac.;

hydrogen; palladium on activated charcoal in ethanol T=20°C; 6 h;