Structure Revisions of Phenolic Bisabolane Sesquiterpenes and a Ferroptosis Inhibitor from the Marine-Derived Fungus <i>Aspergillus versicolor</i> YPH93
Seven new phenolic bisabolane sesquiterpenoids (1–7), along with 10 biogenetically related analogues (8–17), were obtained from the deep-sea-derived fungusAspergillusversicolor YPH93. The structures were elucidated based on extensive analyses of the spectroscopic data. Compounds 1–3 are the first examples of phenolic bisabolanes that contain two hydroxy groups attached to the pyran ring. The structures
Diastereofacial Control in the Reaction of (R)-α-(<i>p</i>-Tolylsulfinyl)acetophenones with Several Organometallics
作者:Tamotsu Fujisawa、Atsushi Fujimura、Yutaka Ukaji
DOI:10.1246/cl.1988.1541
日期:1988.9.5
controlled addition of organometallics to optically active β-ketosulfoxide was achieved to furnish both diastereomers of β-hydroxy sulfoxide depending on the selection of organometallic reagents. Trichloromethyltitanium added to (R)-α-(p-tolylsulfinyl)acetophenones to give (RsRc)-β-hydroxy sulfoxides, while (RsSc)-β-hydroxy sulfoxides were obtained by utilizing trimethylaluminum. The utility of the present