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Further intramolecular reactions of 1,2,4-triazines. Synthesis of furo[2,3-b]pyridines and dihydropyrano[2,3-b]pyridines

✍ Scribed by Edward C. Taylor; John E. Macor

Publisher: Elsevier Science
Year: 1986
Tongue: French
Weight: 168 KB
Volume: 27
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)85497-0

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✦ Synopsis

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.

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