Water → 2-(2-Piperazin-1-ylethoxy)acetamide

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Reaction Steps

A mixture of 13.15 g of (2-chloroethoxy)acetamide (0.1 mol) and 43 g of anhydrous piperazine (0.5 mol) in 250 ml of toluene is introduced into a round-bottomed flask fitted with a water-cooled condenser and a mechanical stirrer. The mixture is heated at the reflux temperature for 4 hours. The precipitate formed is filtered off while hot and the solvent of the filtrate is evaporated off under reduced pressure to dryness. The evaporation residue is purified by chromatography on silica gel (eluent: 14/5/1 (v/v/v) of dichloromethane/methanol/28% aqueous ammonia solution). 7.4 g of 2-[2-(1-piperazinyl)ethoxy]acetamide are obtained in the form of a yellow oil. Yield: 39% Mass spectrum: 188 (MH+), 99 (HN(C4H8)N+=CH2), 44 (CONH2).

Provenance & Evidence