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Efficient syntheses of 3H-azuleno[8,1-cd]pyridazines and their thermal and photochemical reactions

✍ Scribed by Chi-Phi Wu; Rammohan Devulapally; Tsung-Chieh Li; Chien-Kuo Ku; Hsien-Chung Chung

Book ID: 104098045
Publisher: Elsevier Science
Year: 2010
Tongue: French
Weight: 722 KB
Volume: 51
Category: Article
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2010.07.007

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✦ Synopsis

Azulenopyridazines 6 were efficiently synthesized from ethyl 4-hydrazinylazulene-1-carboxylate (2) by p-toluenesulfonic acid-catalyzed imine formation and intramolecular cyclization followed by dehydrogenation using KOH/MeOH in one-pot operation. Thermal and photochemical reactions of azulenopyridazines 6 afforded 1-vinylazulenes 7 in good yields.

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