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. 2013;15(1):89-93.
doi: 10.1080/10286020.2012.745854. Epub 2013 Jan 17.

The resolution of aglinin A epimers and their NMR assignments

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The resolution of aglinin A epimers and their NMR assignments

Tian-Xiang Feng et al. J Asian Nat Prod Res. 2013.

Abstract

Aglinin A (1) is a mixture of C(24)-epimeric 20S,24-epoxy-24,25-dihydroxy-3,4-secodammar-4(28)-en-3-oic acid and present in plants of the family Meliaceae. The two epimers of 1 were resolved through an acetonide reaction, and the absolute configurations of two derivatives were deduced by the analysis of their (13)C NMR differences induced by γ-gauche or steric effect. Based on it, the (13)C NMR assignment of 24R-1 and 24S-1 was also established.

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