Redetermination and absolute configuration of pruniflorone M monohydrate

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Redetermination and absolute configuration of pruniflorone M monohydrate

THE TITLE XANTHONE KNOWN AS PRUNIFLORONE M (SYSTEMATIC NAME: (2R)-5,10-dihy-droxy-2-hy-droxy-methyl-1,1-dimethyl-1H-furo[2,3-c]xanthen-6-one), crystallized in a monohydrate form, C(18)H(16)O(6)·H(2)O. It was isolated from the green fruits of Cratoxylum formosum ssp. pruniflorum. The structure of the title compound has been reported previously [Boonnak et al. (2010 ▶). Aust. J. Chem. 63, 1550-15...

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Redetermination and absolute configuration of berkeleydione

The crystal structure of the title compound, berkeleydione [systematic name; (5aS,7R,9S,11R,11aS)-methyl 9-hy-droxy-1,1,5,7,9,11a-hexa-methyl-14-methyl-idene-3,8,10-trioxo-1,3,4,5a,6,7,8,9,10,11,11a,12-dodeca-hydro-7,11-methano-cycloocta-[4,5]cyclo-hepta-[1,2-c]pyran-11-carboxyl-ate], C26H32O7, has been reported previously [Stierle et al. (2004 ▶). Org. Lett. 6, 1049-1052]. However, the absolut...

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Redetermination and absolute configuration of atalaphylline

THE TITLE ACRIDONE ALKALOID [SYSTEMATIC NAME: 1,3,5-trihydr-oxy-2,4-bis-(3-methyl-but-2-en-yl)acridin-9(10H)-one], C(23)H(25)NO(4), has previously been reported as crystallizing in the chiral ortho-rhom-bic space group P2(1)2(1)2(1) [Chantrapromma et al. (2010 ▶). Acta Cryst. E66, o81-o82] but the absolute configuration could not be determined from data collected with Mo radiation. The absolute...

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Redetermination and absolute configuration of 6-hydroxy­salvinolone

THE CRYSTAL STRUCTURE OF THE TITLE COMPOUND [SYSTEMATIC NAME: 5,6,10-trihydr-oxy-7-isopropyl-1,1,4a-trimethyl-2,3,4,4a-tetra-hydro-phenanthren-9(1H)-one], C(20)H(26)O(4), has been reported previously [Salae et al. (2009 ▶). Acta Cryst. E65, o2379-o2380], but the absolute configuration could not be determined as there was no significant anomalous dispersion using data collected with Mo radiation...

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Redetermination and absolute configuration of (+)-7-epiclusianone

The absolute configuration of 3-benzoyl-4-hy-droxy-6,6-dimethyl-1,5,7-tris-(3-methyl-but-2-en-yl)bicyclo-[3.3.1]non-3-ene-2,9-dione, C(33)H(42)O(4), isolated from Hypericum hypericoides, has been determined. The previous study [Xiao et al. (2007 ▶). J. Nat. Prod.70, 1779-1782] gave only the established relative configuration. The three stereogenic centers are now established as 1R, 5R and 7S on...

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ژورنال

عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online

سال: 2011

ISSN: 1600-5368

DOI: 10.1107/s1600536811025177