Studies on the constituents of the plants of illicium species. III. Structure elucidations of novel phytoquinoids, illicinones and illifunones from Illicium tashiroi Maxim. and I. arborescens Hayata.
作者:KENICHI YAKUSHIJIN、TOMOKO TOHSHIMA、EIJI KITAGAWA、RIKA SUZUKI、JUNKO SEKIKAWA、TAKAYUKI MORISHITA、HIROYUKI MURATA、SHENGTEN LU、HIROSHI FURUKAWA
DOI:10.1248/cpb.32.11
日期:——
Chemical constituents of the leaves of Illicium tashiroi and I. arborescens (Illiciaceae) were examined. Novel phytoquinoids, (+)-illicinone-A (1a), -B (2a), -C (3a), and -D (4a), and illifunone-A (5a) and -B (5b) were isolated from I. tashiroi, and characterized. As constituents of I. arborescens, enantiomers (1b and 2b) of (+)-illicinone-A (1a) and -B (2a), and diastereoisomers (2c, 3b, 4b, and 4c) of (+)-illicinone-B (2a), -C (3a), and -D (4a) were characterized. The absolute stereochemistry of (-)-illicinone-A was established by analysis of the circular dichroism (CD) spectra of the α-hydroxy ketones (15 and 16) derived from 1b. The stereochemistries of other illicinones and illifunones deduced from the chemical and/or biogenetic correlations.
研究了Illicium tashiroi和I. arborescens(Illiciaceae)叶片的化学成分。从 I. tashiroi 中分离出了新的植物喹啉类化合物 (+)-illicinone-A (1a)、-B (2a)、-C (3a) 和 -D (4a),以及 illifunone-A (5a) 和 -B (5b),并对其进行了表征。作为 I. arborescens 的成分,(+)-illicinone-A (1a) 和 -B (2a) 的对映体(1b 和 2b),以及 (+)-illicinone-B (2a)、-C (3a) 和 -D (4a) 的非对映异构体(2c、3b、4b 和 4c)均已表征。通过分析由 1b 衍生出的α-羟基酮(15 和 16)的圆二色(CD)光谱,确定了(-)-紫杉酮-A 的绝对立体化学性质。根据化学和/或生物遗传相关性推断出了其他伊利西酮和伊利西酮的立体化学结构。