Absolute Stereochemistry of (-)-Preorixine and Related Compounds.
作者:Shinji FUNAYAMA、Kiyoshi MURATA、Shigeo NOZOE
DOI:10.1248/cpb.44.1885
日期:——
The absolute stereochemistry of the C-2' position of (-)-preorixine, postulated to be an important biosynthetic precursor of various quinoline alkaloids, was assigned as R by the combination of its chemical transformation and the extended Mosher method. The stereochemistry of the C-2' position of (+)-orixine was also concluded to be R, establishing taht no inversion occurred when (-)-preorixine was transformed into (+)-orixine.
Orixajaponica (Rutaceae) is a shrub widely distributed in Japan, and has been found to contain various quinolinealkaloids. We investigated the alkaloidal constituents of O. japonica, and four quinolinealkaloids were isolated and characterized. Three of these alkaloids are new natural products.