C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 49/293 (2006.01) C07C 45/59 (2006.01) C07C 45/67 (2006.01)
Patent
CA 2083113
A process is described for the production of the known intermediate cyclopropylmethyl- ketone which delivers a high yield, few side products, high reaction efficiency and turnover, and is more viable practically and commercially. In the presence of an excess of a Periodic Table Group I or Group II metal halide or quaternary phosphonium halide, .alpha.-acetyl-.gamma.-butyrolactone is led continuously into a reaction vessel at 170-200 °C and cyclopropylmethylketone distilled off continuously. The halide is recovered and recycled in the process.
Hunston Roger
Waditschatka Rudolf
Ag Ciba-Geigy
Fetherstonhaugh & Co.
Syngenta Participations Ag
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