期刊
TETRAHEDRON LETTERS
卷 44, 期 26, 页码 4877-4880出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(03)01094-3
关键词
heliannuol E; Helianthus annuus L. cv. SH-222; allelopathy; phenolic oxidation; ring expansion; spirodienone
Heliannuol E 1, isolated from Helianthus annuus L. cv. SH-222, was successfully synthesized in both optically active forms. by novel ring-expansion reaction of the corresponding spirodienone derivatives 8 and 17, which were produced from 7 and 16 under anodic oxidation conditions. The absolute structure of the natural product was determined to have R-configuration at the benzylic position. (C) 2003 Elsevier Science Ltd. All rights reserved.
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