A number of substituted ethyl formylacetates and ethyl formylmethylphosphonates were synthesized and their enolization studied by NMR. The ethyl halogen-or cyan)-formylacetates and formylmethylphosphonates exhibited stable trans-enolic forms in solutions. Variation of groupings bonded to the CO or PO groups affect the chelating centre basicity. With higher basicity the cis-enolic form is stabilized
condensation of carbanions of α-chloro-α-lithiated phosphonates with carbonyl precursors gives direct access to α-chlorine-β-carbonyl phosphonates. The reactions with ethylformate, dimethylformamide, carboxylic esters, diethyl carbonates, diethyl oxalates etc. are discussed. In each case the intermediates have been identified.
Some Transformations of Mono-and Dichloro(diethoxyphosphoryl)acetaldehydes
作者:V. M. Ismailov、G. E. Allakhverdieva、N. D. Sadykhova、I. A. Mamedov、N. N. Yusubov
DOI:10.1134/s1070363220010132
日期:2020.1
Addition of ethanol and diethylphosphonate to the carbonyl group of 2,2-dichloro-2-(diethoxyphosphoryl)-acetaldehyde has been studied, and the corresponding α-chloro ether, acetal, and phosphorylated metrifonate have been obtained. α,α-Dichloro-α-phosphoryl carbonyl compounds have been found to undergo haloform cleavage by the action of bases. Perkow reaction of mono- and dichloro(diethoxyphosphoryl)acetaldehydes
Reactions of α-Phosphoryl-α-haloacetaldehydes with Difunctional Nucleophiles
作者:Kh. A. Asadov、R. N. Burangulova、F. I. Guseinov
DOI:10.1007/s11178-005-0195-x
日期:2005.4
Reactions of phosphorylated α-haloacetaldehydes with difunctional nitrogen-, oxygen-, and sulfur-containing nucleophiles were performed with a view to synthesize C-phosphorylated heterocyclic compounds.