Configurational Study of Diastereoisomeric Royleanone Diterpenoids from Salvia concolor

Mónica Díaz-Fernández, María I. Salazar, Pedro Joseph-Nathan, Eleuterio Burgueño-Tapia

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

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Resumen

© The Author(s) 2019. The known diterpenoids horminone (1) and taxoquinone (2) as a mixture, and pure 6,7-dehydroroyleanone (7) were isolated from the aerial parts of not yet studied Salvia concolor Lamb. Although 1 and 2 are known, the 1H Nuclear Magnetic Resonance (NMR) data of their acetyl derivatives 4 to 6 are only partially described. Moreover, the 13C NMR data assignments for 4 and 6 show some inconsistencies and reveal better agreement with those we obtained for diastereoisomeric 3 and 5. Since stereochemical aspects were in doubt, it was considered as mandatory to unambiguously determine the absolute configuration of 3 to 6 using vibrational circular dichroism spectroscopy, which then allowed the complete 1H and 13C NMR chemical shift assignments of 4 to 6.
Idioma originalInglés estadounidense
PublicaciónNatural Product Communications
DOI
EstadoPublicada - 1 ene 2019

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