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Inicio » Actividades I+D > Publicaciones 2014 > Two drimane lactones, valdiviolide and 1...
artículo con referato
"Two drimane lactones, valdiviolide and 11-epivaldiviolide, in the form of a 1:1 cocrystal obtained from Drimys winteri extracts"
Cristian Paz Robles, Darío Mercado, Sebastián Suarez and Ricardo Baggio
Acta Cryst. C 70(12) (2014) 1112-1115
A cocrystal, C15H22O3·C15H22O3, (I), obtained from Drimys winteri, is composed of two isomeric drimane sesquiterpene lactones, namely valdiviolide, (Ia), and 11-epivaldiviolide, (Ib), neither of which has been reported in the crystal form. Both diastereoisomers present three chiral centres at sites 5, 10 and 11, with an SSR sequence in (Ia) and an SSS sequence in (Ib). O–HO hydrogen bonds bind molecules into chains running along [\overline{1}20] and the chains are in turn linked by ππ stacking interactions to define planar weakly interacting arrays parallel to (001).
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