A New Approach to the Synthesis of Acyclic Nucleotide Phosphonate Analogues with Triple or Double Bonds
作者:Valery Brel
DOI:10.1055/s-0031-1289812
日期:2012.8
basis of new methodology to design the phosphonate analogues of nucleotides, the first series of acyclic nucleotides possessing a triple bond in the carbon skeleton were prepared by coupling diethyl 4-chlorobuta-1,2-dienylphosphonate with the corresponding purine or pyrimidine nucleic bases under base-catalyzed alkylation conditions. On the basis of new methodology to design the phosphonate analogues
Synthesis of 3-Azido-4-(diethoxyphosphoryl)alka-1,3-dienes and Their Transformation to Derivatives of 2<i>H</i>-Azirine
作者:Valery Brel
DOI:10.1055/s-2007-983837
日期:2007.9
New 3-azidoalka-1,3-dienylphosphonates were synthesized by a convenient and efficient method. These compounds are useful as intermediates in the preparation of 2-(diethoxyphosphoryl)-3-(3-phenyl-4,5-dihydroisoxazol-5-yl)-2H-azirines and 2-(diethoxyphosphoryl)-3-vinyl-2H-azirines.
Just by the introduction of isomerizable groups and successive [3,3] or [2,3] rearrangements, the diols 1 can be transformed into the new synthetic building blocks 2. The conversion often proceeds with high stereoselectivity or even stereospecificity, and in some cases in a one-pot reaction. X, Y=NHCOCCl3 , N3 , P(O)Ph2 , 4-SO2 C6 H4 Me, S(O)Ar, SCOR.