期刊
TETRAHEDRON
卷 63, 期 29, 页码 6741-6747出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2007.04.078
关键词
tabularisins A-D; phragmalins; Chukrasia tabularis; absolute configuration; X-ray diffraction
Tabularisins A-D (1-4), a new class of phragmalins incorporating a cyclopropanyl ring, were isolated from Chukrasia tabularis. Compounds 1 and 2 are also the first examples of phragmalins with an 8,9,11- ortho ester. The structures of 1 and 3 were confirmed by single crystal X-ray studies. The absolute configuration of 2 was determined by CD exciton chirality method on its benzoate (2a), and those of 1, 3, and 4 were proposed by correlating with 2 chemically and biogenetically. similar to 2007 Elsevier Ltd. All rights reserved.
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