79333-62-3Relevant academic research and scientific papers
YLURES SANS SEL, EVOLUTION EN PHOSPHORANES ET EQUILIBRE YLURE PHOSPHORANE I. SYNTHESE ET STRUCTURE
Burgada, R.,El Khoshnieh, Y. O.,Leroux, Y.
, p. 1207 - 1222 (2007/10/02)
Synthesis of new salt-free ylids 9, 12 to 16, 19, 20, 22, 27 and 29 and phosphoranes 10, 17, 18, 21, 23, 30 to 33 by addition of a trivalent phosphorus compound (phosphites and amino-phosphines) 1 to 7 with dimethyl acetylenedicarboxylate in presence of a protic trapping reagent are described.The results are consistent with trapping of carbanionic species.In relation with the cyclic or acyclic structure of the trivalent phosphorus compound and the protic trapping reagent ie: methanol, phenol, carboxylic acid, etc.., several pathways are involved.Clearly, three phenomena are shown: one can obtain an ylid via a phosphorane or conversely a phosphorane via an ylid or an equilibrium phosphorane ylid.Results are dealing with thermodynamic or kinetically controlled reactions.
FIRST EVIDENCE FOR AN YLID ->/<- PHOSPHORANE EQUILIBRIUM
Burgada, Ramon,Leroux, Yves,Khoshnieh, Y. O. El
, p. 181 - 182 (2007/10/02)
The synthesis of a salt-free ylid and of a phosphorane obtained by addition of a trivalent phosphorus compound with dimethylacetylene dicarboxylate in the presence of a trapping reagent, benzoic acid is described.This paper is concerned with the first evidence for an ylid-phosphorane equilibrium.
