3-Fluoroaniline → HCID 17982610, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 12.0 g (108 mmol) of 3-fluoraniline and 16 g of 2-chlorodioxene (contains 6% of 2,2-dichlorodioxane) is heated at 100° C. for 24 hours. The mixture is allowed to cool, and excess 2-chlorodioxene is removed under reduced pressure, giving 25 g of 2-(2-chloroethoxy)-N-(3-fluorophenyl)acetamide as brown oil; ESI 232. This oil is dissolved in 400 ml of acetonitrile, and 84.7 g (260 mmol) of caesium carbonate are added. The suspension formed is stirred at room temperature for 18 hours. The reaction mixture is filtered, and the filtrate is evaporated, giving 21.0 g of 4-(3-fluorophenyl)morpholin-3-one as brown oil; ESI 196. 1H-NMR (d6-DMSO): δ=3.77 (t, J=5 Hz; 2H), 3.97 (t, J=5 Hz; 2H), 4.23 (s; 2H), 7.11 (dddd, J1=8 Hz, J2=8 Hz, J3=2 Hz, J4=0.5 Hz, 1H), 7.26 (ddd, J1=8 Hz, J2=2 Hz, J3=0.5 Hz, 1H), 7.34 (ddd, J1=10 Hz, J2=2 Hz, J3=2 Hz, 1H), 7.45 (ddd, J1=8 Hz, J2=8 Hz, J3=7 Hz, 1H).

Provenance & Evidence