Efficient syntheses of 3H-azuleno[8,1-cd]pyridazines and their thermal and photochemical reactions |
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| Authors: | Chi-Phi Wu Rammohan Devulapally Tsung-Chieh Li Hsien-Chung Chung |
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| Affiliation: | a Department of Chemistry, Chung Yuan Christian University, Chungli 32023, Taiwan
b Department of Natural Science, Taipei Municipal University of Education, Taipei 10042, Taiwan |
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| Abstract: | 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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| Keywords: | Azulene Azulenopyridazine p-Toluenesulfonic acid Thermal reaction Photochemical reaction |
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