12-Acetyl-6-hydroxy-3,3,9,9-tetramethylfuro[3,4-b]pyrano[3,2-h]-xanthene-7,11(3H,9H)-dione

Cheng, Gwendoline Lian Ee and Siow, Hwa Teo and Huey, Chong Kwong and Mohamed Tahir, Mohamed Ibrahim and Silong, Sidik (2010) 12-Acetyl-6-hydroxy-3,3,9,9-tetramethylfuro[3,4-b]pyrano[3,2-h]-xanthene-7,11(3H,9H)-dione. Acta Crystallographica Section E: Structure Reports Online , 66 (12). pp. 3331-3332. ISSN 1600-5368; ESSN:1600-5368

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Official URL: http://dx.doi.org/10.1107/S1600536810048592

Abstract

The title compound, Artonol B, C24H20O7, isolated from the stem bark of Artocarpus kemando, consists of four six-membered rings and one five-membered ring. The tricyclic xanthone ring system is almost planar [maximum deviation 0.115 (5) Å], whereas the pyran­oid ring is in a distorted boat conformation·The furan ring is almost coplanar with the fused aromatic ring, making a dihedral angle of 3.76 (9)°. The phenol ring serves as a intra­molecular hydrogen-bond donor to the adjacent carbonyl group and also acts as an inter­molecular hydrogen-bond acceptor for the methyl groups of adjacent mol­ecules, forming a three-dimensional network in the crystal.

Item Type:Article
Keyword:single-crystal X-ray study
Subject:Artocarpus
Subject:Flavonoids
Subject:Chemical structure
Faculty or Institute:Faculty of Science
Publisher:International Union of Crystallography
DOI Number:10.1107/S1600536810048592
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1107/S1600536810048592
ID Code:12630
Deposited By: Najwani Amir Sariffudin
Deposited On:12 Aug 2011 03:36
Last Modified:31 Oct 2013 02:25

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