Redetermination and absolute configuration of pruniflorone M monohydrate.

ABSTRACT: 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, 1550-1556], but we report here the absolute configuration determined using Cu Kα radiation. There are two crystallograpically independent mol-ecules in the asymmetric unit, which differ slightly in the bond angles. The hy-droxy-methyl substituents at position 2 of the furan rings of both pruniflorone M mol-ecules adopt R configurations. In both mol-ecules, the three rings of the xanthone skeleton are approx

SUBMITTER: Fun HK 

PROVIDER: S-EPMC3212307 | biostudies-literature | 2011 Aug

REPOSITORIES: biostudies-literature