Heterocyclic nucleoside analogues: design and synthesis of antiviral, modified nucleosides containing isoxazole heterocycles
作者:Yoon-Suk Lee、Byeang Hyean Kim
DOI:10.1016/s0960-894x(02)00182-8
日期:2002.5
We have designed and synthesized novel antiviral nucleoside analogues, which consist of isoxazole rings as modified sugars and nucleobases (thymine, uracil, and 5-fluorouracil) with a methylene linker between them. These compounds represent a new class of modifiednucleoside analogues and some of them show potent antiviral activities against Polio virus (Coxsackie B type 3 and Vesicular Stomatitis)
A base promoted multigram synthesis of aminoisoxazoles: valuable building blocks for drug discovery and peptidomimetics
作者:Bohdan A. Chalyk、Inna Y. Kandaurova、Kateryna V. Hrebeniuk、Olga V. Manoilenko、Irene B. Kulik、Rustam T. Iminov、Vladimir Kubyshkin、Anton V. Tverdokhlebov、Osman K. Ablialimov、Pavel K. Mykhailiuk
DOI:10.1039/c6ra02365g
日期:——
A practical multigram metal free synthesis of isoxazole-containing building blocks from commercially available amino acids was elaborated. The key reaction was a regioselective [3 + 2]-cycloaddition of in situgenerated nitrile oxides with alkynes/enamines. The obtained building blocks were used in the preparation of bioactive compounds and peptidomimetics.
A Second-Generation Cycloaddition Route to 5-Substituted 3-Acyltetramic Acids
作者:Raymond C. F. Jones、Claire E. Dawson、Mary J. O'Mahony
DOI:10.1055/s-1999-3091
日期:——
The 1,3-dipolar cycloaddition of α-aminonitrile oxides, formed from α-amino-acids, to enamines of β-ketoesters affords 3-(1-aminoalkyl)isoxazole-4-carboxylic esters that are converted via pyrrolo[3,4-c]isoxazol-4-ones into 5-substituted 3-acetyltetramic acids.
Pyrroloisoxazoles as a Building Block for 3-Enoyltetramic Acids
作者:Raymond Jones、Terence Pillainayagam
DOI:10.1055/s-2004-835640
日期:——
3-Methylpyrrolo[3,4-c]isoxazoles prepared by nitrile oxide cycloaddition, are deprotonated and condensed with aromatic aldehydes; N-O bond cleavage with Mo(CO)6 affords 3-enoyltetramic acids whilst with H2-catalyst further reduction to 3-acyltetramic acids is observed.
Copper(0) Nanoparticles in Click Chemistry: Synthesis of 3,5-Disubstituted Isoxazoles
作者:T. M. Vishwanatha、Vommina V. Sureshbabu
DOI:10.1002/jhet.2065
日期:2015.11
An efficient procedure for the synthesis of 3,5‐disubstituted isoxazoles via [3 + 2] cycloaddition reaction of in situ generated nitrileoxides with acetylenes employing readily preparable copper(0) nanoparticles is described. A variety of in situ generated nitrileoxide and acetylenic substrates were engaged in the study and found to undergo cyclization in short duration affording respective isoxazoles