TY - JOUR
T1 - Colouring matters of australian plants. xxii† ventilagone
T2 - Crystal structure and an approach to synthesis
AU - Cooke, Raymond G.
AU - Liu, Anita
AU - Raston, Colin L.
AU - White, Allan H.
PY - 1980
Y1 - 1980
N2 - The crystal structure of the title compound, a naturally occurring tricyclic quinone, C16H16O5, has been found to be (1R*, 3S*)-7, 10-dihydroxy-1, 3, 8-trimethy1-3, 4, 6, 9-tetrahydro-1H-naphtho[2, 3-c]- pyran-6, 9-dione by single-crystal X-ray diffraction methods at 295(1) K and refined by least squares to a residual of 0·033 for 1143 ‘observed’ reflections. Crystals are monoclinic, P21, a 8·346(8), b 16·79(2), c 4·911(5) Å, β 101·17(8)°, Z 2. The molecule is shown to have the cis configuration. As an approach to the synthesis of the pigment the model compound 5-chloro-8-methoxy-1, 3- dimethylisochroman has been prepared and the two racemic forms have been separated and characterized.
AB - The crystal structure of the title compound, a naturally occurring tricyclic quinone, C16H16O5, has been found to be (1R*, 3S*)-7, 10-dihydroxy-1, 3, 8-trimethy1-3, 4, 6, 9-tetrahydro-1H-naphtho[2, 3-c]- pyran-6, 9-dione by single-crystal X-ray diffraction methods at 295(1) K and refined by least squares to a residual of 0·033 for 1143 ‘observed’ reflections. Crystals are monoclinic, P21, a 8·346(8), b 16·79(2), c 4·911(5) Å, β 101·17(8)°, Z 2. The molecule is shown to have the cis configuration. As an approach to the synthesis of the pigment the model compound 5-chloro-8-methoxy-1, 3- dimethylisochroman has been prepared and the two racemic forms have been separated and characterized.
UR - http://www.scopus.com/inward/record.url?scp=84970582819&partnerID=8YFLogxK
U2 - 10.1071/CH9800303
DO - 10.1071/CH9800303
M3 - Article
AN - SCOPUS:84970582819
VL - 33
SP - 303
EP - 311
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
SN - 0004-9425
IS - 2
ER -