期刊
TETRAHEDRON LETTERS
卷 54, 期 19, 页码 2419-2422出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2013.02.103
关键词
Electron transfer; Photoreaction; Tin-free reductive radical cyclization reaction; Allyl 2-bromoaryl ether
Tin-free, photoinduced electron transfer promoted reductive radical cyclization reactions of allyl 2-bromoaryl ethers in the presence of NaOH in 2-PrOH were found to take place efficiently to give 3-methyl-2,3-dihydrobenzofurans. In contrast to conventional radical cyclization reactions that employ AIBN/Bu3SnH in benzene, the new method utilizes NaOH and 2-PrOH that are both readily available and benign. Consequently, the newly developed photochemical process serves as a versatile and environmentally friendly method for carrying out aryl radical cyclization reactions. (C) 2013 Elsevier Ltd. All rights reserved.
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