192382-63-1Relevant academic research and scientific papers
An efficient and facile access to substituted 1e,3e-dienylphosphonates via horner-wadsworth-emmons olefination of α,β-unsaturated aldehydes with tetraethyl methylenebisphosphonate
Yahyaoui, Marwa,Touil, Soufiane,Samarat, Ali
supporting information, p. 729 - 731 (2018/05/22)
An operationally simple and high-yielding synthetic method for 1E,3E-dienylphosphonates has been developed through the Horner-Wadsworth-Emmons olefination of α,β-unsaturated aldehydes with tetraethyl methylenebisphosphonate, in heterogeneous medium, in th
Halodephosphorylation of α,β-unsaturated phosphonic acid monoesters
Lahrache, Hind,Robin, Sylvie,Rousseau, Gérard
, p. 1635 - 1637 (2007/10/03)
Reaction of α,β-ethylenic and acetylenic phosphonic acid monoesters with (biscollidine)iodine(I) or (biscollidine)bromine(I) hexafluorophosphate led to α,β-unsaturated halides by, without precedent, dephosphorylation reactions.
Conjugate addition of lithiated Schollkopf's bislactim ether to 1E,3E-Butadienylphosphonates: Stereocontrolled access to 2,3 -anti-4E 2-Amino-6-phosphono-4-hexenoic acid derivatives
Ojea, Vicente,Conde, Susana,Ruiz, Maria,Fernandez, Ma Carmen,Quintela, Jose Ma
, p. 4311 - 4314 (2007/10/03)
Face-selective 1,6-addition of lithiated Schollkopf's bislactime ether 5 to 4-substituted, 1,4- or 3,4-disubstituted 1E,3E-butadienylphosphonates 6a-d allows a direct and stereocontrolled access to semi-rigid AP6 analogues, the 2,3-anti-4E 2-amino-6-phosphono-4-hexenoic acid derivatives 4a-c. The relative stereochemistry was assigned from a NMR study of the cyclic derivative 12c. Tenmembered trans-fused chair-boat-like transition states are invoked to rationalize the stereochemical outcome of the addition.
