5-halo-4h-1,3-dioxin-4-one compounds, .alpha.-halo-...

Details 5-halo-4h-1,3-dioxin-4-one compounds, .alpha.-halo-... 5-halo-4h-1,3-dioxin-4-one compounds, .alpha.-halo-...

C - Chemistry, Metallurgy

07

C

260/438.1, 260/4

C07C 69/72 (2006.01) C07F 1/04 (2006.01)

Patent

CA 1248125

5-Halo-4H-1,3-Dioxin-4-One Compounds, .alpha.-Halo- Acetoacetic Esters Prepared from Such Compounds and Process for their Preparation Abstract Disclosed are 5-halo-4H-1,3-dioxin-4-ones and their preparation by treating a compound having the formula Image with X2 or SO2X2 wherein X is Cl or Br. The 5-halo-4H-1,3-dioxin-4-ones can then be reacted with an alkali metal alkoxide at a temperature of about -40°C. to about 50°C. to provide an .alpha.-haloaceto- acetic ester.

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