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Synthesis of 4-arylidenecyclohexane-1,3-dione derivatives was carried out from the Baylis-Hillman acetates. The potential utility of the prepared compounds for the synthesis of cyclohexanedione oxime ether herbicides was examined.
The reaction of the DABCO salts 2, generated in situ from the Baylis-Hillman acetates 1, and KCN in aqueous THF gave ethyl 3-cyano-2-methylcinnamates 4a-d and 3-cyano-2-methylcinnamonitriles 4e-f in good yields.
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