1,4-Dioxa-8-azaspiro(4.5)decane → HCID 57024242, compound

Participants

Reaction Steps

A solution of 1-(1H-pyrrole-2-carbonyl)imidazole (0.54 g, 3.4 mnmol) and 4-piperidone ethylene ketal (0.43 ml, 3.4 mmol) in THF (10 ml) was heated at reflux for 1 h. The mixture was cooled and evaporated, diluted with ethyl acetate, washed with dilute HCl, dried over sodium sulphate and evaporated to afford a beige solid (0.56 g), MS (+CI) 237 ([M+H]+), 1H NMR (CDCl3) 9.47 (1H, br. s), 6.92 (1H, m), 6.53 (1H, m), 6.25 (1H, m), 4.00 (4H, s), 3.91 (4H, t, J 5.4 Hz), 1.78 (4H, t, J 5.8 Hz).

Provenance & Evidence