期刊
TETRAHEDRON LETTERS
卷 45, 期 26, 页码 5139-5141出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2004.04.150
关键词
beta-tetronic acid bromide; 4-bromocoumarin; potassium alkynlytrifluoroborates; palladium catalyzed; cross-coupling
An efficient synthesis of 4-(1-alkynyl)-2(5H)-furanones has been developed utilizing a palladium catalyzed coupling reaction of beta-tetronic acid bromide with potassium alkynyltrifluoroborates in the absence of base. 4-Alkynylcoumarins were also synthesized using this method. The reactions are straightforward and the yields are excellent. (C) 2004 Elsevier Ltd. All rights reserved.
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