Synthesis and properties of chromono[2,3-b]pyridines
β Scribed by A. I. Mikhalev; M. E. Konshin
- Book ID
- 112331438
- Publisher
- Springer US
- Year
- 1976
- Tongue
- English
- Weight
- 308 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0009-3122
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract Cyclocondensation of cyanoacetamide and cyanothioacetamide with sodium salt of 3βhydroxyβ1β(pyridinβ3βyl)propβ2βenβ1βone gave 6βoxoβ[2,3β²]bipyridine **5a** and 6βthioxoβ[2,3β²]bipyridine **5b** derivatives, respectively. Compound **5b** upon treatment with different methylenes **8** gave
3-(3-Butynyloxy)-and 3-(4-pentnyfoxy)-1,2,4-triazines undergo facile intramolecular Diels-Alder reactions to yield 2,3-dihydrofuro(2,3-@pyridines and dihydropyrano(2,3-&)pyridines respectively. The former are readily dehydrogenated with DDQ to furo(2,3\_l$pyridines.