Ethyl diethoxyphosphinyl formate

Related Reactions. p-Keto ester formation from ketones may be achieved directly with dialkyl carbonates and dialkyl dicarbonates, or indirectly with dialkyl oxalates, methyl magnesium carbonate, and ethyl diethoxyphosphinyl formate. Re-giocontrol is problematical, however, and is more reliably effected by trapping enolates with carbon dioxide, carbon disulfide, or carbon oxysulfide followed by methylation. In the latter cases, the dithio and thiol esters are converted into the parent carboxy... 

The condensation between dimethyl (lithiomethyl)phosphonate and methyl glycouronides yields carbohydrate-derived -0x0 phos-phonates" The anion from diethyl (but-2-en-l-yl)phosphonate and Ida reacts with ethyl formate to give 4-(diethoxyphosphinyl)-2-methylbut-2-enal . The di-/3-oxo phosphonates (633) were prepared in a similar fashion, and when these are acted upon by a base, they undergo intramolecular cyclization to give the unsaturated and functionalized phosphonate esters (634) . ... 

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