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Improved and Efficient Synthesis of Chromeno[4,3- d ]pyrazolo [3,4- b ]pyridin-6(3 H )-ones and Their Fluorescence Properties

โœ Scribed by Liu, Xue-Cheng; Lin, Wei; Wang, Hui-Yan; Huang, Zhi-Bin; Shi, Da-Qing


Book ID
126097073
Publisher
Journal of Heterocyclic Chemistry
Year
2013
Tongue
English
Weight
769 KB
Volume
51
Category
Article
ISSN
0022-152X

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An expedient method for the synthesis of 2-phenyl-5-aryl-2,3-dihydropyrazolo [3,4-b]pyridin-3-ones and 2-phenyl-3-oxo-2,3-dihydropyrazolo[3,4-b]pyridine-5-carbaldehyde in a single-step via condensation of vinamidinium salts with 3-amino-1-phenyl-2-pyrazolin-5-one is described.