期刊
TETRAHEDRON LETTERS
卷 48, 期 30, 页码 5265-5268出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2007.05.133
关键词
thiophenol; AlBN; [3,3] sigmatropic rearrangement; radical cyclization; dihydrofurocoumarin; dihydropyranocoumarin
Regioselective synthesis of dihydrofurocoumarins and dihydropyranocoumarins in excellent yields from 4-prop-2-ynyloxy coumarin via a thiol mediated radical reaction is described. Alkenyl radicals are generated from easily available terminal alkynes and thiophenol. Thiophenol catalyzed the Claisen rearrangement of the 4-prop-2-ynyloxycoumarin ethers. (c) 2007 Elsevier Ltd. All rights reserved.
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