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Title: Chemistry and crystal structures of some constituents of zingiber cassumunar
Authors: Thanomwang Amatayakul
Jack R. Cannon
Pimchit Dampawan
Thaweephol Dechatiwongse
Robin G.F. Giles
Charus Huntrakul
Kosan Kusamran
Mongkol Mokkhasamit
Colin L. Rastton
Vichai Reutrakul
Allan H. White
Thailand Ministry of Public Health
University of Western Australia
Mahidol University
University of Cape Town
Keywords: Chemistry
Issue Date: 1-Jan-1979
Citation: Australian Journal of Chemistry. Vol.32, No.1 (1979), 71-88
Abstract: The novel aromatic compounds cis-3-(2′, 4′, 5′-trimethoxyphenyl)-4-[(E)-2"′, 4′, 5"′-trimethoxy-styryl]cyclohex-1-ene (1), cis-3-(3′, 4′-dimethoxyphenyl)-4-[(E)-3"′, 4′"-dimethoxystyryl] cyclohex-l-ene (2), a substance assigned the tentative structure cis-3-(3′, 4′-dimethoxyphenyl)-4-[(E)-2"′, 4′", 5′"-trimethoxystyryl]cyclohex-1-ene (3), (E)-4-(3′, 4′-dimethoxypheny1)but-3-en-1-ol (5), (E)-4-(3′, 4′-di-methoxypheny1)but-3-en-1-yl acetate (6), and 8-(3′, 4′-dimethoxypheny1)-2-methoxynaphtho-1, 4-quinone (7) have been isolated from the rhizomes of Zingiber cassurnunav Roxb. (Zingiberaceae). The crystal structures of the cyclohexene derivative (1) and the quinone (7) have been determined from X-ray diffractometer data at 295 K and refined by block diagonal least squares to residuals of 0.046 (2099 ′observed′ reflections) and 0.093 (1246), respectively. Crystals of compound (1) are triclinic, P ī, a 18.027(12), b 10.037(9), c 6.530(5) Å, α 84.22 (7), ß 81-87 (6), γ 85.72 (6)°, Z 2. Crystals of the quinone (7) are monoclinic, P 2 1 /a, a 22.89 (1), b 8.022 (5), c 8.458 (5) Å, ß 91.98 (5)°, Z 4. Although the latter crystal structure determination is imprecise, due largely to the very small size of the crystal available, the solution is unambiguous. A simple two-step synthesis of the quinone (7) has been achieved. © 1979 Australian Journal of Chemistry, All rights reserved.
ISSN: 14450038
Appears in Collections:Scopus 1969-1990

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