58263-57-3Relevant academic research and scientific papers
Enantioselective hydrophosphinylation of 1-alkenylphosphine oxides catalyzed by chiral strong Br?nsted base
Ishikawa, Sho,Kondoh, Azusa,Terada, Masahiro
supporting information, p. 7814 - 7817 (2020/11/02)
A catalytic enantioselective addition of diarylphosphine oxides to 1-alkenyl(diaryl)phosphine oxides was achieved by using a chiral ureate as a chiral strong Br?nsted base catalyst. The reaction followed by the reduction of phosphine oxide moieties provid
C-Alkyl-bis-phosphoryl chelating systems for the potential recovery of strategic metals
Babouri, Rachida,Halidou Dougourikoye, Abdoul Razak,Ilagouma, Amadou TidJani,Pirat, Jean-Luc,Virieux, David,Volle, Jean-No?l
, (2020/09/07)
Methylene-bis-phosphonic acid and derivatives are used as complexing agents, diagnostics, therapeutics and show interesting virustatic properties. We describe the syntheses of mono- and di-substituted bisphosphonates and mono- and disubstituted diethyl ((diphenylphosphoryl)methyl)phosphonate as possible chelating systems for the recovery of strategic metals.
ALKYLIDENEDIPHOSPHONATES ET VINYLPHOSPHONATES: UNE DEMARCHE SYNTHETIQUE SELECTIVE PAR VOIE CARBANIONIQUE
Teulade, Marie-Paule,Savignac, Philippe,Aboujaoude, Elie Elia,Lietge, Stephane,Collignon, Noel
, p. 283 - 300 (2007/10/02)
Phosphonoalkylation of acylchloro-phosphates or -phosphinates in the presence of excess lithium diisopropylamide leads to direct generation of lithiated methylenediphosphonate anions.This stable type of anion can be either protonated in acidic medium to provide tetrasubstituted methylenediphosphonate or alkylated.When aliphatic or aromatic aldehydes are added spontaneous formation of vinylphosphonates is observed.This process is a simple and convenient route to diphosphonic as well as to vinylphosphonic compounds.
CONVERSION DIRECTE "IN SITU" DES ALKYL EN VINYLPHOSPHONATES.
Aboujaoude, E. Elia,Collignon, N.,Lietje S.
, p. 4435 - 4438 (2007/10/02)
Phosphorus acyl chlorides phosphonoalkylation leads to the direct generation of alkylidenediphosphonates anions convertible into vinylphosphonates.
SYNTHESE STEREOSELECTIVE D'ESTERS α,β-ETHYLENIQUES α-METHYLES Z OU E PAR LA REACTION DE WITTIG-HORNER A PARTIR DE PHOSPHONATES OU D'OXYDES DE PHOSPHINE
Etemad-Moghadam, Guita,Seyden-Penne, Jacqueline
, p. 5153 - 5166 (2007/10/02)
The reaction of α-branched aldehydes with diethyl 1-carbomethoxyethyl phosphonate 1b in THF/nBuLi at low temperature leads stereoselectively to Z α-methyl α,β-unsaturated esters.From a linear aldehyde, the reaction is less stereoselective, while from α,β-unsaturated ones, the E isomers are predominantly formed in good yields.From diphenyl 1-carbomethoxyethyl phosphine oxide 2b, E α-methyl α,β-unsaturated esters are stereoselectively formed either in DMF/tBuOK or in phase transfer conditions, whatever the starting aldehyde is, also in good yields.This reagent can thus advantageously replace the corresponding P-ylid.In all cases, the reaction conditions are determined so that by-products formation is minimized.
