Synthesis of triazolyl-alkylphosphonate starting from ω-azidoalkylphosphonates or ω-alkynylphosphonates
摘要:
1,2,3-Triazolyl-alkylphosphonates are synthesised according to a Huisgen 1,3-dipolar cycloaddition catalysed by copper salts. The cycloaddition of either an alkynylphosphonate with an azidoalkane or an azido-phosphonate with an alkyne is achieved in high yield and regiospecifically. As an illustration of the functionalisation of aromatic ligands by using the catalytic version of the Huisgen reaction, the coupling of 3-ethynyl-1,10-phenanthroline with azidoalkylphosphonate is reported. (c) 2007 Elsevier Ltd. All rights reserved.
Michael addition of phosphorus derivatives on tetraethyl ethylidenediphosphonate
摘要:
Nucleophilic phosphorus add to tetraethyl ethylidene diphosphonate in protic solvent to yield the product of the Michael reaction. This reaction appeared to be reversible at a temperature upper than 160 degrees C. To avoid this reverse reaction, alkylation in g. position of the two phosphonate functions by activated elecrophile is reported. (c) 2005 Elsevier Ltd. All rights reserved.
A convergent approach to functionalise aromatic compounds with a linker terminated by a phosphonate group is reported. The starting point of this strategy is the synthesis of five new ω-alkyne-phosphonates. The linker between the phosphonate group and the alkyne part is either an alkyl or an ether chain. This strategy is based on the use of the phosphonate group as the anchoring point for the attachment
1,2,3-Triazolyl-alkylphosphonates are synthesised according to a Huisgen 1,3-dipolar cycloaddition catalysed by copper salts. The cycloaddition of either an alkynylphosphonate with an azidoalkane or an azido-phosphonate with an alkyne is achieved in high yield and regiospecifically. As an illustration of the functionalisation of aromatic ligands by using the catalytic version of the Huisgen reaction, the coupling of 3-ethynyl-1,10-phenanthroline with azidoalkylphosphonate is reported. (c) 2007 Elsevier Ltd. All rights reserved.
Michael addition of phosphorus derivatives on tetraethyl ethylidenediphosphonate
作者:Lise Delain-Bioton、Adele Turner、Nicolas Lejeune、Didier Villemin、Gary B. Hix、Paul-Alain Jaffrès
DOI:10.1016/j.tet.2005.04.045
日期:2005.7
Nucleophilic phosphorus add to tetraethyl ethylidene diphosphonate in protic solvent to yield the product of the Michael reaction. This reaction appeared to be reversible at a temperature upper than 160 degrees C. To avoid this reverse reaction, alkylation in g. position of the two phosphonate functions by activated elecrophile is reported. (c) 2005 Elsevier Ltd. All rights reserved.