TY - JOUR
T1 - Alpinumisoflavone
AU - Harrison, Jerry Joe Ebow Kingsley
AU - Tabuchi, Youhei
AU - Ishida, Hiroyuki
AU - Kingsford-Adaboh, Robert
PY - 2008/3/5
Y1 - 2008/3/5
N2 - The title compound, C20H16O5, {systematic name: 5-hydr-oxy-7-(4-hydroxy- phen-yl)-2,2-dimethyl-2H,6H-benzo[1,2-b:5,4-b′]dipyran-6-one}, was obtained by demethyl-ation of the biologically active related compound, 4-O-methyl-alpinum-iso-flavone. The mol-ecular structure of the title compound is characterized by a fused tricyclic system that contains an approximately planar benzopyrone ring fragment. The six membered pyran ring adopts a half-chair conformation. Both ring systems show an out-of-plane twist. The dihedral angle between the mean plane of the benzopyrone system and the benzene ring is 54.29 (3)°. The mol-ecules are linked by O - H⋯O hydrogen bonds, forming a mol-ecular tape running along the b axis.
AB - The title compound, C20H16O5, {systematic name: 5-hydr-oxy-7-(4-hydroxy- phen-yl)-2,2-dimethyl-2H,6H-benzo[1,2-b:5,4-b′]dipyran-6-one}, was obtained by demethyl-ation of the biologically active related compound, 4-O-methyl-alpinum-iso-flavone. The mol-ecular structure of the title compound is characterized by a fused tricyclic system that contains an approximately planar benzopyrone ring fragment. The six membered pyran ring adopts a half-chair conformation. Both ring systems show an out-of-plane twist. The dihedral angle between the mean plane of the benzopyrone system and the benzene ring is 54.29 (3)°. The mol-ecules are linked by O - H⋯O hydrogen bonds, forming a mol-ecular tape running along the b axis.
UR - http://www.scopus.com/inward/record.url?scp=41849098950&partnerID=8YFLogxK
U2 - 10.1107/S1600536808006867
DO - 10.1107/S1600536808006867
M3 - Article
AN - SCOPUS:41849098950
SN - 1600-5368
VL - 64
SP - o713
JO - Acta Crystallographica Section E: Structure Reports Online
JF - Acta Crystallographica Section E: Structure Reports Online
IS - 4
ER -