抄録
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.
