An efficient method for the phosphonation of C=X compounds
作者:A. O. Kolodyazhnaya、O. O. Kolodyazhnaya、O. I. Kolodyazhnyi
DOI:10.1134/s1070363210040055
日期:2010.4
(aldehydes, ketones, ketophosphonates, aldimines, ketimines, isocyanates, isothiocyanates, and activated olefins) in the presence of amines and anilines hydrohalides was studied. We found that pyridine hydrohalides effectively activate the reaction of tralkyl phosphites with various C=X electrophiles: aldehydes, ketones, ketophosphonates, aldimines, ketimines, isocyanates, isothiocyanates, and activated
New Catalyst for Phosphonylation of C˭X Electrophiles
作者:Oleg I. Kolodiazhnyi、Olga O. Kolodiazhna
DOI:10.1080/00397911.2010.542602
日期:2012.6
recyclable catalyst for the reaction of trialkylphosphites with various C˭X electrophiles (aldehydes, ketones, ketophosphonates, imines, isocyanates, isothiocyanates, activated alkenes) to afford corresponding α-substituted phosphonates in good yields. The main advantages of the new catalyst is strong activity, accessibility, good yields of products, and gentle conditions of reaction. GRAPHICAL ABSTRACT
Tetramethylguanidine (TMG)-catalyzed addition of dialkyl phosphites to α,β-unsaturated carbonyl compounds, alkenenitriles, aldehydes, ketones and imines
作者:Daniele Simoni、Francesco Paolo Invidiata、Monica Manferdini、Ilaria Lampronti、Riccardo Rondanin、Marinella Roberti、Gian Piero Pollini
DOI:10.1016/s0040-4039(98)01656-6
日期:1998.10
Tetramethylguanidine-catalyzed addition of dialkyl phosphites to α,β-unsaturated carbonylcompounds, alkenenitriles, aldehydes and ketones constitutes a practical route to a variety of phosphonate synthons. The very mild conditions employed, together with the short reaction times, make the procedure highly versatile and tolerant to a range of functionalities. The proposed methodology is also convenient
The Preparation of Dialkyl 1-Hydroxyalkylphosphonates in the Reaction of Trialkyl Phosphites with Oxonium Salts Derived from Aldehydes or Ketones
作者:Mirosław Soroka、Waldemar Goldeman
DOI:10.1055/s-2006-950200
日期:——
The reaction of trialkylphosphites with aldehydes or ketones in the presence of hydrogen chloride gives dialkyl 1-hydroxy-alkylphosphonates via Arbusov-like reaction of oxonium salts derived from aldehydes or ketones. This reaction is a very convenient instant method for the preparation of dialkyl 1-hydroxyalkyl-phosphonates with a good yield as an alternative to the well-known Abramov reaction.
Nucleophilic addition to carbonyl compounds. competition between hard (amine) and soft (phosphite) nucleophile
作者:Roman Gancarz
DOI:10.1016/0040-4020(95)00634-k
日期:1995.9
reaction mixture, two nucleophiles: dialkyl phosphite and the amine compete for the electrophilic carbonylcompound. Reaction mixture composition studies, kinetic studies as well as theoretical calculations, indicate that the softer the carbonylcompound is, the faster it reacts with the softer phosphorus nucleophile and the slower it reacts with the harder amine nucleophile. It in turn results in