Journal
TETRAHEDRON LETTERS
Volume 47, Issue 33, Pages 5949-5951Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2006.06.064
Keywords
radical cyclization; aromatic carbonyls; titanocene(III) chloride; benzopyrans
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Aromatic carbonyl compounds undergo smooth intramolecular radical cyclization with alkenes or alkynes using titanocene(Ill) 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. (c) 2006 Elsevier Ltd. All rights reserved.
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