Journal
TETRAHEDRON LETTERS
Volume 45, Issue 1, Pages 187-189Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2003.10.138
Keywords
pyranocoumarins; inocalocyclides; lactonization; ene cyclization
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Lactonization of inocalophyllins A (5) and B (6) with toluenesulfonic acid has yielded four novel pyranocoumarins, designated inocalocyclides A-D (1-4). This reaction involved a rare elimination of an isoprene unit and an ene cyclization. (C) 2003 Elsevier Ltd. All rights reserved.
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