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ChemInform Abstract: Organic Azides in Heterocyclic Synthesis. Part 35. Ring Closure Reactions of 5-Azidopyrido[2,3-d]pyrimidinetriones to Isoxazolo- and Oxadiazolopyrido[2,3-d]pyrimidinetriones.

✍ Scribed by Dang Van Tinh; Wolfgang Stadlbauer

Publisher
John Wiley and Sons
Year
2009
Weight
36 KB
Volume
40
Category
Article
ISSN
0931-7597

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Ring closure reactions of 5-azidopyrido[
Ring closure reactions of 5-azidopyrido[2,3-d]pyrimidinetriones to isoxazolo- and oxadiazolopyrido[2,3-d]pyrimidinetriones
✍ Dang Van Tinh; Wolfgang Stadlbauer πŸ“‚ Article πŸ“… 2008 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 227 KB

## Abstract magnified image Thermal decomposition of 5‐azidopyrido[2,3‐__d__]pyrimidines 2 and 7 having reactive __ortho__‐substituents such as a formyl or a nitro group yielded isoxazolo[3β€²,4β€²:4,5]pyrido[2,3‐__d__]pyrimidines 3 or oxadiazolo‐[3β€²,4β€²:4,5]pyrido[2,3‐__d__]pyrimidines 9. The reaction