Methyl 5,7-dihydroxy-2,2,9-trimethyl-6,11-dioxo-6,11-dihydro-2H-anthra[2,3-b]pyran-8-carboxylate
The title compound, C22H18O7, also known as laurentiquinone B, is a new anthraquinone which was isolated from Vismia laurentii, a Cameroonian medicinal plant. The asymmetric unit contains two independent molecules. Each of them contains four fused rings, three of which are coplanar and typical of an...
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| Format: | Article |
| Language: | English |
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International Union of Crystallography
2008-12-01
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| Series: | Acta Crystallographica Section E |
| Online Access: | http://scripts.iucr.org/cgi-bin/paper?S160053680803794X |
| _version_ | 1818321401678921728 |
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| author | Annelise Lobstein Silvère Ngouela Cyril Antheaume Lydia Brelot Diderot Noungoue Tchamo |
| author_facet | Annelise Lobstein Silvère Ngouela Cyril Antheaume Lydia Brelot Diderot Noungoue Tchamo |
| author_sort | Annelise Lobstein |
| collection | DOAJ |
| description | The title compound, C22H18O7, also known as laurentiquinone B, is a new anthraquinone which was isolated from Vismia laurentii, a Cameroonian medicinal plant. The asymmetric unit contains two independent molecules. Each of them contains four fused rings, three of which are coplanar and typical of anthracene, while the heterocyclic rings adopt envelope conformations. Intramolecular O—H...O hydrogen bonds result in the formation of two planar rings, which are also almost coplanar with the adjacent rings. In the crystal structure, intermolecular O—H...O and C—H...O hydrogen bonds link the molecules and a π–π contact is also present [centroid-centroid distance = 3.967 (3) Å]. |
| first_indexed | 2024-12-13T10:40:19Z |
| format | Article |
| id | doaj.art-3d9dbc8b0c7146a3b547da48995c3977 |
| institution | Directory Open Access Journal |
| issn | 1600-5368 |
| language | English |
| last_indexed | 2024-12-13T10:40:19Z |
| publishDate | 2008-12-01 |
| publisher | International Union of Crystallography |
| record_format | Article |
| series | Acta Crystallographica Section E |
| spelling | doaj.art-3d9dbc8b0c7146a3b547da48995c39772022-12-21T23:50:32ZengInternational Union of CrystallographyActa Crystallographica Section E1600-53682008-12-016412o2414o241510.1107/S160053680803794XMethyl 5,7-dihydroxy-2,2,9-trimethyl-6,11-dioxo-6,11-dihydro-2H-anthra[2,3-b]pyran-8-carboxylateAnnelise LobsteinSilvère NgouelaCyril AntheaumeLydia BrelotDiderot Noungoue TchamoThe title compound, C22H18O7, also known as laurentiquinone B, is a new anthraquinone which was isolated from Vismia laurentii, a Cameroonian medicinal plant. The asymmetric unit contains two independent molecules. Each of them contains four fused rings, three of which are coplanar and typical of anthracene, while the heterocyclic rings adopt envelope conformations. Intramolecular O—H...O hydrogen bonds result in the formation of two planar rings, which are also almost coplanar with the adjacent rings. In the crystal structure, intermolecular O—H...O and C—H...O hydrogen bonds link the molecules and a π–π contact is also present [centroid-centroid distance = 3.967 (3) Å].http://scripts.iucr.org/cgi-bin/paper?S160053680803794X |
| spellingShingle | Annelise Lobstein Silvère Ngouela Cyril Antheaume Lydia Brelot Diderot Noungoue Tchamo Methyl 5,7-dihydroxy-2,2,9-trimethyl-6,11-dioxo-6,11-dihydro-2H-anthra[2,3-b]pyran-8-carboxylate Acta Crystallographica Section E |
| title | Methyl 5,7-dihydroxy-2,2,9-trimethyl-6,11-dioxo-6,11-dihydro-2H-anthra[2,3-b]pyran-8-carboxylate |
| title_full | Methyl 5,7-dihydroxy-2,2,9-trimethyl-6,11-dioxo-6,11-dihydro-2H-anthra[2,3-b]pyran-8-carboxylate |
| title_fullStr | Methyl 5,7-dihydroxy-2,2,9-trimethyl-6,11-dioxo-6,11-dihydro-2H-anthra[2,3-b]pyran-8-carboxylate |
| title_full_unstemmed | Methyl 5,7-dihydroxy-2,2,9-trimethyl-6,11-dioxo-6,11-dihydro-2H-anthra[2,3-b]pyran-8-carboxylate |
| title_short | Methyl 5,7-dihydroxy-2,2,9-trimethyl-6,11-dioxo-6,11-dihydro-2H-anthra[2,3-b]pyran-8-carboxylate |
| title_sort | methyl 5 7 dihydroxy 2 2 9 trimethyl 6 11 dioxo 6 11 dihydro 2h anthra 2 3 b pyran 8 carboxylate |
| url | http://scripts.iucr.org/cgi-bin/paper?S160053680803794X |
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