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Start Over Descriptor "Boesenbergia" Journal australian journal of chemistry
5 results on '"Boesenbergia"'

1. Constituents of the Zingiberaceae. X. Diastereomers of [7-Hydroxy-5-Methoxy-2-Methyl-2-(4′-Methylpent-3′-Enyl)-2H-Chromen-8-yl] [3″-Methyl-2′-(3′″-Methylbut-2″′-Enyl]-6″-Phenylcyclohex-3″-Enyl]M Ethanone (Panduratin B), a Constituent of the Red Rhizomes of a Variety of Boesenbergia pandurata

Author

Kelvin Picker, Orasa Pancharoen, Vichai Reutrakul, Walter Charles Taylor, and Pittaya Tuntiwachwuttikul

Subjects
Boesenbergia, biology, Chemistry, Biocatalysis, Stereochemistry, Diastereomer, New materials, Zingiberaceae, General Chemistry, biology.organism_classification, Rhizome
Abstract

Spectroscopic studies have established that panduratin B1 and panduratin B2, isolated from the red rhizomes of a variety of Boesenbergia pandurata ( Roxb .) Schltr ., are the diastereomers (2RS,1″ RS,2″SR,6″RS)- and (2RS,1″SR,2″RS,6″SR)-[7-hydroxy-5-methoxy-2-methyl-2-(4′-methylpent-3′-enyl)-2 H-chromen-8-yl][3″-methyl-2″-(3″′-methylbut-2″′-enyl)-6″-phenylcyclohex-3″-enyl]methanone. A synthesis of panduratin B mixture has been achieved by chromenylation of panduratin A.

Published
1987

2. Constituents of Boesenbergia pandurata (syn. Kaempferia pandurata): Isolation, Crystal Structure and Synthesis of (±)-Boesenbergin A

Author

V. A. Patrick, Orasa Pancharoen, Vichai Reutrakul, A. H. White, Pittaya Tuntiwachwuttikul, T Jaipetch, and S Kanghae

Subjects
Kaempferia, Chalcone, food.ingredient, Pinocembrin, biology, Stereochemistry, General Chemistry, Crystal structure, biology.organism_classification, Boesenbergia, chemistry.chemical_compound, food, chemistry, Zingiberaceae, Boesenbergia rotunda
Abstract

Partly racemized pinostrobin and pinocembrin, together with 2',6'-dihydroxy-4'-methoxychalcone, cardamonin and a new chalcone (�) boesenbergin A, have been isolated from Boesenbergia pandurata Schl. (syn. Kaempferia pandurata Roxb., Zingiberaceae). Spectroscopic studies and X-ray crystallographic analysis have established the structure (�)-(E)-1-[7'-hydroxy-5'-methoxy-2'-methyl- 2'-(4''-methylpent-3''-enyl)-2'H-chromen-8'-yl]-3-phenylprop-2-enone for boesenbergin A. A simple synthesis of boesenbergin A has been achieved and its acid-catalysed cyclization has been studied.

Published
1982

3. Constituents of Boesenbergia sp. Isolation and crystal structure of crotepoxide ([1R-(1α,2α,4α,5β,6α,7α,)]-4-[(Benzoyloxy)methyl]-3,8-dioxatricyclo[5, 1,0,02,4]octane-5,6-diyl diacetate)

Author

Vichai Reutrakul, Pittaya Tuntiwachwuttikul, A. H. White, Orasa Pancharoen, and V. A. Patrick

Subjects
biology, Supramolecular chemistry, Epoxide, General Chemistry, Crystal structure, biology.organism_classification, Boesenbergia, chemistry.chemical_compound, Crystallography, chemistry, Biocatalysis, Orthorhombic crystal system, Single crystal, Octane
Abstract

The crystal structure of crotepoxide, isolated from the rhizomes of Boesenbergia sp., has been determined by single crystal X-ray diffraction methods at 295 K, being refined to a residual of 0.059 for 682 independent 'observed' reflections. Crystals are orthorhombic, P212121, a 23.53(2), b 10.59(1),c, 6.99(1)�, Z 4.

Published
1984

4. (1'RS,2'SR,6'RS)-(2,6-Dihydroxy-4-methoxyphenyl)-[3'-methyl-2'-(3'-methylbut-2'-enyl)-6'-phenyl-cyclohex-3'-enyl]methanone (panduratin A)-a Constituent of the Red Rhizomers of a variety of Boesenbergia pandurata

Author

Vichai Reutrakul, LT Byrne, Orasa Pancharoen, and Pittaya Tuntiwachwuttikul

Subjects
Boesenbergia, food.ingredient, food, biology, Biocatalysis, Chemistry, Stereochemistry, New materials, Zingiberaceae, General Chemistry, biology.organism_classification, Boesenbergia rotunda, Rhizome
Abstract

Spectroscopic studies have established the structure (l'RS,2'SR,6'RS)-(2,6-dihydroxy-4-methoxy- phenyl)[3'-methyl-2'-(3''-methylbut-2''enyl)-6'-phenylcyclohex-3'-enyl]methanone for panduratin A which, together with pinostrobin and two known chalcones, boesenbergin A and rubranine, has been isolated from the red rhizomes of a variety of Boesenbergia pandurata (Roxb.) Schltr. A synthesis of rubranine, in moderate yield, has also been achieved.

Published
1984

5. Constituents of Boesenbergia pandurata (syn. Kaempferia pandurata). III. Isolation and synthesis of (±)-boesenbergin B

Author

Vichai Reutrakul, Pittaya Tuntiwachwuttikul, C. Mahidol, and Walter C. Taylor

Subjects
Boesenbergia, Kaempferia, biology, Chemistry, Stereochemistry, Zingiberaceae, General Chemistry, biology.organism_classification, Chalcone derivative
Abstract

A new chalcone derivative (�)-boesenbergin B and the known (�)-panduratin A have been isolated from Boesenbergia pandurata Schl. (syn. Kaempferia pandurata Roxb.; family Zingiberaceae). Spectroscopic studies have established the structure (�)-(E)-1-[5'-hydroxy-7'-methoxy-2'-methyl- 2'-(4''-methylpent-3''-enyl)-2'H-l-benzopyran-6'-yl]-3-phenylprop-2-en-1-one for boesenbergin B. A simple synthesis of boesenbergin B has been achieved and its acid-catalysed cyclization has been studied.

Published
1984

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