One-Pot, Three-Component Approach to Diarylmethylphosphonates: A Direct Entry to Polycyclic Aromatic Systems
作者:Sure Siva Prasad、Dileep Kumar Singh、Ikyon Kim
DOI:10.1021/acs.joc.9b00668
日期:2019.5.17
A newtype of three-component reaction was developed consisting of aldehydes, electron-rich (hetero)arenes, and trialkylphosphite, which provided facile access to a wide range of diarylmethylphosphonates under mild reaction conditions. Simple one- or two-step synthetic manipulation of the resulting compounds enabled us to reach several polycyclic (hetero)aromatic systems efficiently.
Mechanistic approach for expeditious and solvent-free synthesis of α-hydroxy phosphonates using potassium phosphate as catalyst
作者:Makarand A. Kulkarni、Uday P. Lad、Uday V. Desai、Satish D. Mitragotri、Prakash P. Wadgaonkar
DOI:10.1016/j.crci.2012.10.009
日期:2013.2
Résumé An extremely simple, high yielding, highly rapid and solvent-free protocol has been described for hydrophosphylation of aldehydes using potassium phosphate as catalyst. Easy commercial availability of the reusable catalyst, operational simplicity at ambient temperature and avoidance of conventional work-up as well as purification procedure makes this solvent-free protocol a near-ideal synthesis. Supplementary Materials: Supplementary material for this article is supplied as a separate file: mmc1.pdf
synthesized from the reaction of aldehyde (1) with triethylphosphite (2) in the presence of oxone and evaluated for their antioxidantproperties against lipid peroxidation, reduced glutathione, superoxide dismutase, and catalase. The majority of the compounds showed promising antioxidant activity. Diethyl anthracen‐9‐yl (hydroxy) methylphosphonate (3n) is the most potent and biologically active compound
An easy access to α-aryl substituted γ-ketophosphonates: Lewis acid mediated reactions of 1,3-diketones with α-hydroxyphosphonates and tandem regioselective C–C bond cleavage
作者:Gangaram Pallikonda、Manab Chakravarty、Manoj K. Sahoo
DOI:10.1039/c4ob01091d
日期:——
The α-aryl substituted (±)-γ-ketophosphonates are produced by Lewis acid mediated reactions of α-hydroxyphosphonates with 1,3-diketones.
FeCl<sub>3</sub>-Mediated Arylation of α-Hydroxyphosphonates with Unactivated Arenes: Pseudo-Umpolung in Allylic Phosphonates
作者:Gangaram Pallikonda、Manab Chakravarty
DOI:10.1002/ejoc.201201352
日期:2013.2
An FeCl3-mediated regio- and stereoselective Friedel–Crafts-type arylation of α-hydroxy phosphonates with unactivatedarenes has been developed in which the unstable allylphosphonate cations generated are stabilized by extended conjugation. The approach provides a simple, efficient and economic approach to highly demanding stereoselective γ-aryl-substituted vinylphosphonates and dialkyl (diarylmethyl)phosphonates