Add time:09/10/2019 Source:sciencedirect.com
Treatment of diethyl 1,1-dibromo-1-fluoromethylphosphonate with n-BuLi (1:1) at low temperature affords by self-trapping in quantitative yield the lithiated derivative of tetraethyl fluoromethylenediphosphonate which is reacted with alkylating and halogenating agents or converted with high selectivity into (E) diethyl fluorovinylphosphonates by reaction with carbonyl compounds.
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