Synthesis of polyfunctionalized methylphosphine oxides
作者:V. P. Morgalyuk、T. V. Strelkova、E. E. Nifant’ev
DOI:10.1007/s11172-012-0053-2
日期:2012.2
N,N-Dialkylamino(diphenylphosphoryl)chloromethanes, a new type of organophosphorus compounds, were synthesized. On dissolving in polar and low polar solvents, N,N-dialkylamino(diphenylphosphoryl)chloromethanes dissociate spontaneously with the P—C bond cleavage to form the diphenylphosphinite anion Ph2PO−. This was confirmed by the reaction of N,N-dimethylamino(diphenylphosphoryl)chloromethane with electrophilic substrates to form the corresponding addition or substitution products of Ph2PO−. The capability of spontaneous generating the diphenylphosphinite anion considers accessible N,N-dimethylamino(diphenylphosphoryl)chloromethane as a synthetic equivalent of the diphenylphosphinite anion.
Reactions of N,N-dimethylamino(diphenylphosphoryl)chloromethane with alkan-2-ones
作者:V. P. Morgalyuk、T. V. Strelkova、E. E. Nifant’ev
DOI:10.1007/s11172-012-0255-7
日期:2012.9
The direction of the reaction of N,N-dimethylamino(diphenylphosphoryl)chloromethane with alkan-2-ones depends on the ketone structure. N,N-Dimethylamino(diphenylphosphoryl)-chloromethane reacts with linear alkan-2-ones following the Abramov-type reaction to give α-phosphorylated alcohols, while the reaction with branched alkan-2-ones and acetophenone proceeds as the Mannich-type reaction affording the phosphorylated Mannich bases.
The chemical properties of chloro(dialkylamino)(diphenylphosphinoyl)methanes have been studied using the simplest compound of this series, chloro(dimethylamino)(diphenylphosphinoyl)methane, as an example. Chloro(dimethylamino)(diphenylphosphinoyl)methane shows ambident reactivity when reacting with electrophiles and nucleophiles depending on coreactant nature, it behaves as either electrophilic substrate or phosphorus nucleophile. This fact can be explained by its dissociation in solutions with both C–Cl bond cleavage to give (dimethylamino)(diphenylphosphinoyl)methyl cation and Cl− anion and C–P bond cleavage to form chloro(dimethylamino)methyl cation and diphenylphosphinite anion. The capability of chloro(dimethylamino)(diphenylphosphinoyl)methane to produce spontaneously Ph2PO–anion allows us to recommend application in organic and organophosphorus synthesis as a synthetic equivalent (synthon) of diphenylphosphinite anion.
A scheme of the stepwise reaction of diphenylchlorophosphine with N,N-dialkylformamides in the presence of NaI
作者:V. P. Morgalyuk、T. V. Strelkova
DOI:10.1134/s1070363211100094
日期:2011.10
On an example of DMF was proposed and experimentally verified stepwise reaction scheme of the reaction of diphenylchlorophosphine with N,N-dialkylformamides. The first stage is autocatalytic reaction of the synthesis of (diphenylphosphoryl)(N,N-dialkylamino)chloromethanes proceeding through the intermediate formation of diphenyldichloro[(N,N-dialkylamino)chloromethyl]phosphoranes. In the second stage