Acetyl chloride → HCID 11743554, compound

Participants

Reaction Steps

2.2 g of 5,6-dihydro-2-methyl-8-hydroxy-1-{2-[4-(4-methylpyridin-2-yl)piperazin-1-yl]ethyl}-4H-pyrrolo[3,2,1-ij]quinoline (preparation see Example 6), 0.884 g of acetyl chloride and 0.78 ml of triethylamine were heated under reflux for 5 hours in 15 ml of toluene. To work up the reaction mixture it was added to 50 ml of 10% strength aqueous sodium hydroxide solution. The toluene phase was separated and washed with water until neutral and concentrated. 2 g of crude product were obtained, which was purified by chromatography on a small silica gel column using first dichloromethane and then dichloromethane/ethanol 98:2. 1.8 g of oily title compound were obtained. This was converted into its hydrochloride as described in Example 1H). 1.72 g of 8-acetoxy-5,6-dihydro-2-methyl-1-{2-[4-(4-methylpyridin-2-yl)piperazin-1-yl]ethyl}-4H-pyrrolo-[3,2,1-ij]quinoline 2 HCl 22.5 H2O having a melting point of 220° C. were obtained.

Provenance & Evidence