1-(2-Hydroxyethyl)piperazine → HCID 4742800, compound

Participants

Reaction Steps

To a refluxing mixture of 1.05 g (0.0081 mol) N-(2-hydroxy-ethyl)piperazine, 0.75 g (0.0054 mol) dry potassium carbonate and 5 ml toluene, a solution of 0.76 g (0.0027 mol) 1-[(2-chloroethoxy)(4-fluorophenyl)methyl]-4-fluorobenzene in 3 ml toluene was added dropwise. The reaction mixture was refluxed for 11 h and then cooled to room temperature. It was diluted with toluene (100 ml) and extracted with 2N hydrochloric acid (100 ml). The acidic extract was washed with one portion of toluene, then rendered basic by addition of 4N sodium hydroxide solution (75 ml) and extracted with toluene (100 ml). The toluene solution was washed successively with two portions of water and once with brine. Evaporation in vacuo gave a yellowish oil, which was redissolved in acetonitrile (20 ml). The title compound was precipitated as the dimaleate salt with an excess of a maleic acid solution in acetonitrile. By recrystallization from hot acetonitrile/methanol 1.29 g (78% of the theoretical yield) of the title compound was obtained as white crystals, m.p. 163° C.

Provenance & Evidence