An Efficient Route to Pyrimidine Nucleoside Analogues by [4 + 2] Cycloaddition Reaction
作者:Morwenna S. M. Pearson、Aélig Robin、Nathalie Bourgougnon、Jean Claude Meslin、David Deniaud
DOI:10.1021/jo034709a
日期:2003.10.1
synthesis for pyrimidine nucleoside analogues by [4 + 2] cycloaddition reaction. These compounds were obtained by convergent chemistry from glycosyl isothiocyanates 3a-f (pyranoses, furanoses, and dissaccharides) and diazadienium salt 5. In fact, diazapentadienium iodide 5 prepared from vinylthioamide 4 is an efficient intermediate in heterocyclic synthesis and reacts with isothiocyanates 3a-f affording
Synthesis of pyridone and pyridine rings by [4+2] hetero-cyclocondensation
作者:Aélig Robin、Karine Julienne、Jean Claude Meslin、David Deniaud
DOI:10.1016/j.tetlet.2004.10.142
日期:2004.12
Substituted pyridones and pyridines have been synthesised efficiently by employing iminium salt as a key precursor. These compounds were prepared using tandem [4+2] cycloaddition/deamination between azabutadiene and dienophiles.