Radical promoted cyclizations of aromatic carbonyl compounds to benzopyrans using titanocene(III) chloride |
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| Authors: | Samaresh Jana |
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| Institution: | Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India |
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| Abstract: | Aromatic carbonyl compounds undergo smooth intramolecular radical cyclization with alkenes or alkynes using titanocene(III) chloride to furnish the corresponding benzopyrans. The radical initiator, Cp2TiCl, was prepared in situ from commercially available titanocene dichloride (Cp2TiCl2) and zinc dust in THF under argon. |
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| Keywords: | Radical cyclization Aromatic carbonyls Titanocene(III) chloride Benzopyrans |
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