Abstract
Acylcuprate reagents generated by the reaction of dialkyleyanocuprates with carbon monoxide at low temperature ({minus}110 C) readily react with diethyl vinylphosphonate to give 30oxoalkylphosphonates in good yields after hydrolysis. The reaction intermediates can also be trapped by allylic bromides to give 1-allyl-3-oxoalkylphosphonates in good yields.
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