Journal
TETRAHEDRON LETTERS
Volume 47, Issue 47, Pages 8369-8373Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2006.09.067
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Mercuric triflate was shown to be a powerful catalyst for the cyclization of alkynyl tert-butylcarbonates giving rise to cyclic enol carbonates under mild conditions. Internal alkynyl carbonate affords endo cyclization product selectively, while terminal alkynyl carbonate provides only exo cyclization product. (c) 2006 Elsevier Ltd. All rights reserved.
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