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Novel method for the synthesis of pyrido[2,3-d]pyrimidine-2,4-diones from 5,7-dimethylpyrimido[4,5-e]-1,2,4-triazine-6,8-dione

โœ Scribed by S. V. Shorshnev; A. I. Chernyshev; S. E. Esipov; A. F. Pozharskii; V. V. Kuz'menko; A. V. Gulevskaya


Publisher
Springer US
Year
1987
Tongue
English
Weight
84 KB
Volume
23
Category
Article
ISSN
0009-3122

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Synthesis of novel 2,3-substituted-2,4-d
โœ Thomas Brady; Khang Vu; Jack R. Barber; Shi Chung Ng; Yuefen Zhou ๐Ÿ“‚ Article ๐Ÿ“… 2009 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 440 KB

Novel 2,3-substituted-2,4-dihydro-pyrazolo[4,3-d] pyrimidine-5,7-diones were successfully synthesized with moderate to good yields using a new synthetic approach. The structures of the regio-isomers in this series were determined by single crystal X-ray analysis and NMR spectra.