Sodium Carbonate → 1-(4-1H-indolyl)-4-[3,3-bis-(2-pyridyl)propyl]piperazine

Participants

Reaction Steps

A mixture of 1.15 g of Compound 16B, 1.2 g of 1-(4-indolyl)piperazine (prepared as described in EP 138,280), 1.24 mL of acetic acid, 1.71 g of sodium triacetoxyborohydride and 85 mL of 1,2-dichloroethane was stirred at room temperature for 24 h. Afterwards it was diluted with water and alkalinized with sodium carbonate. The organic layer was dried on sodium sulphate and evaporated to dryness affording 1.53 g of crude, which was purified by flash chromatography (ethyl acetate-2.2 N methanolic ammonia, gradient from 9.4:0.6 to 9.2:0.8) affording 0.28 g (13%) of the title product as an oil.

Provenance & Evidence