期刊
TETRAHEDRON LETTERS
卷 45, 期 24, 页码 4711-4714出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2004.04.096
关键词
propargyl alcohols; biradicals; cycloaromatization; intramolecular [4+2] cycloadditions; methylene-quinone
Thermal and thionyl chloride induced cycloaromatizations of secondary and tertiary aryldiacetylene alcohols were studied. The secondary alcohol did not respond to thionyl chloride, but in all the other cases presumptive biradical intermediates evolved either by intramolecular radical coupling or, when derived from a xanthene scaffold, by intramolecular radical acylation to a diketone that finally afforded a p-methylene-quinone. (C) 2004 Elsevier Ltd. All rights reserved.
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