反应详情

A mixture of 10 g (0.0825 mol) p-fluorobenzonitrile, 47 g (0.3282 mol) of 1,4-dioxa-8-azaspiro[4.5]decane, 17 g (0.123 mol) of K2CO3, and 100 ml of acetonitrile is stirred at 90°-100° C. for three days. The reaction mixture is allowed to cool to ambient temperature, diluted with water and extracted with methylene chloride. The combined extracts are washed with brine, dried over Na2SO4, and concentrated in vacuo to give a pasty solid. Trituration with ethyl ether furnishes 13.4 g (67%) of title compound: m.p. 134°-135° C.; IR (KBr) 2210 and 1600 cm-1 ; NMR (CDCl3) δ7.48 (d, 2H), 6.88 (d, 2H), 4.0 (s, 4H), 3.58-3.40 (m, 4H), and 1.90-1.70 (m, 4H).

1. extractionextracted with methylene chloride
2. washThe combined extracts are washed with brine
3. dry with materialdried over Na2SO4
4. concentrationconcentrated in vacuo
5. customto give a pasty solid