Pyridopyrimidines. Part IV. The preparation of pyrido[4,3-d]pyrimidines from pryano[4,3-d]pyrimidin-5-ones
β Scribed by Ismail, A. G.; Wibberley, D. G.
- Book ID
- 119961939
- Publisher
- The Royal Society of Chemistry
- Year
- 1968
- Tongue
- English
- Weight
- 479 KB
- Category
- Article
- ISSN
- 0022-4952
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π SIMILAR VOLUMES
## Abstract magnified image The cyclocondensation of 5βhydroxyβpyrido[2,3β__d__]pyrimidines **1** with malonates gives pyrano[2β²,3β²:4,5]βpyrido[2,3β__d__]pyrimidines **2**. Nitration of **1** and reduction with zinc in the presence of carboxylic acids/anhydrides gave 2βalkyloxazolo[5β²,4β²:4,5]pyrid
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