Sodium ethoxide → HCID 18507515, compound

Participants

Reaction Conditions

Reaction Steps

Following the method of Toledo et al. (Chem. Mater. 1994, 6, 1222), to a stirred solution 2.61 g (13.0 mmol) (E or Z)-2-(amino-furan-2-yl-methylene)-3-oxo-pentanedinitrile in 30 ml dry ethanol under argon at room temperature was added 4.86 ml (13.0 mmol) sodium ethylate solution (2.67M in ethanol) and the reaction mixture heated at 100° C. for 1 hour. The reaction mixture was then concentrated in vacuo and the residue dissolved in a minimum of water and acidified to pH 4.5 with glacial acetic acid. The resulting crystals were collected by filtration and washed sequentially with water and ether to afford 2,41 g (93%) 6-amino-2-furan-2-yl-4-oxo-1,4-dihydro-pyridine-3-carbonitrile as a white crystalline solid. ES-MS m/e (%): 200 ([M—H]−, 100).

Provenance & Evidence