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Title: | 3-Ethyl-8-methoxy-4-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyloxy)quinolin-2(1H)-one | ||||||||||
Author: | Kimmel, Roman; Nečas, Marek; Kafka, Stanislav; Vícha, Robert; Košmrlj, Janez | ||||||||||
Document type: | Peer-reviewed article (English) | ||||||||||
Source document: | Acta Crystallographica Section E: Structure Reports Online. 2010, vol. 66, issue 6, p. 1328-1329 | ||||||||||
ISSN: | 1600-5368 (Sherpa/RoMEO, JCR) | ||||||||||
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DOI: | https://doi.org/10.1107/S1600536810016636 | ||||||||||
Abstract: | The structure of the title compound, C26H31NO12, contains an essentially planar quinoline skeleton, with the maximum deviation from the best plane being 0.055 (2) ?, and an oxane ring in a classical chair conformation with the following Cremer and Pople puckering parameters: Q = 0.586 (2) ?, ? = 11.5 (2)° and ? = 309.4 (10)°. One acetyl group display rotational disorder with occupancies of 0.634 (8):0.366 (8). The crystal packing is stabilized by N-H...O hydrogen bonds, which link molecules into chains along the a axis. The packing is further stabilized by weak C-H...O interactions. The absolute configurations on the carbons in the oxane ring correspond to those of the commercial starting material and are unchanged in the well known mechanism of the Koenigs-Knorr synthesis. | ||||||||||
Full text: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2979627/ | ||||||||||
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