Tetrahedron Letters p. 2333 - 2336 (1981)
Update date:2022-08-16
Topics:
Iwasa, Kinuko
Gupta, Yash Pal
Cushman, Mark
(+)-Thalictrifoline (3) has been synthesized from an optically resolved (+)-8-oxo-13-carboxytetrahydroprotoberberine (13) whose absolute configuration was established by correlation with (+)-18.This determines the absolute configurations of (+)-thalictrifoline (3) as 13R, 14R and (+)-corydalic acid methyl ester (9) as 3R, 4R.
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