The absolute stereochemistries of (+)-toddalolactone and its related chiral coumarins from Toddalia asiatica(L.) Lam. (T. aculeata Pers.) and their optical purities

Autor:	Jun'ichi Kobayashi, Eri Sakurada, Hisashi Ishii, Tsutomu Ishikawa
Rok vydání:	1992
Předmět:	Lanthanide chemistry.chemical_classification Ozonolysis Bicyclic molecule Chemistry Stereochemistry Absolute configuration Proton NMR Enantiomer Enantiomeric excess Lactone
Zdroj:	Journal of the Chemical Society, Perkin Transactions 1. :1681
ISSN:	1364-5463 0300-922X
DOI:	10.1039/p19920001681
Popis:	The absolute stereochemistries of (+)-toddalolactone (+)-1 and its related chiral coumarins [(+)-toddanol (+)-2, (+)-6-(2-hydroxy-3-methoxy-3-methylbutyl)-5,7-dimethoxycoumarin (+)-3, (+)-6-(3-chloro-2-hydroxy-3-methylbutyl)-5,7-dimethoxycoumarin (+)-4 and (–)-aculeatin (–)-5], isolated from Toddalia asiatica(L.) Lam. (T. aculeata Pers.), have been determined as R by ozonolysis of (+)-1 and by the chemical intercorrelation. Their optical purities were estimated by means of an 1H NMR lanthanoid induced shift study using Eu(hfbc)3.
Databáze:	OpenAIRE
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