4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octa­deca­hydro-12b,8a-(epoxy­methano)­picen-3-yl acetate

The title compound, C(32)H(48)O(4), which was extracted from the bark of Rhododendron arboreum, consists of five fused rings to which an acetate and seven methyl groups are attached. The A, D and E rings adopt chair conformations, the B ring is in a distorted chair and the C ring is in a half-chair...

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Autores principales: Nisar, Mohammad, Ali, Sajid, Tahir, M. Nawaz, Ahmad, Bashir, Hameed, Shahid
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2013
Materias:
Organic Papers
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3629621/
https://www.ncbi.nlm.nih.gov/pubmed/23634108
http://dx.doi.org/10.1107/S1600536813007253
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author Nisar, Mohammad
Ali, Sajid
Tahir, M. Nawaz
Ahmad, Bashir
Hameed, Shahid
author_facet Nisar, Mohammad
Ali, Sajid
Tahir, M. Nawaz
Ahmad, Bashir
Hameed, Shahid
author_sort Nisar, Mohammad
collection PubMed
description The title compound, C(32)H(48)O(4), which was extracted from the bark of Rhododendron arboreum, consists of five fused rings to which an acetate and seven methyl groups are attached. The A, D and E rings adopt chair conformations, the B ring is in a distorted chair and the C ring is in a half-chair conformation. The five-membered ring formed by the lactone group, which bridges from the A/B to the B/C ring junctions, is an approximate envelope with the C atom of the methyne group as the flap [displacement from the other four atoms = 0.753 (2) Å]. There are no identified directional inter­actions in the crystal structure.
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spelling pubmed-36296212013-04-30 4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octa­deca­hydro-12b,8a-(epoxy­methano)­picen-3-yl acetate Nisar, Mohammad Ali, Sajid Tahir, M. Nawaz Ahmad, Bashir Hameed, Shahid Acta Crystallogr Sect E Struct Rep Online Organic Papers The title compound, C(32)H(48)O(4), which was extracted from the bark of Rhododendron arboreum, consists of five fused rings to which an acetate and seven methyl groups are attached. The A, D and E rings adopt chair conformations, the B ring is in a distorted chair and the C ring is in a half-chair conformation. The five-membered ring formed by the lactone group, which bridges from the A/B to the B/C ring junctions, is an approximate envelope with the C atom of the methyne group as the flap [displacement from the other four atoms = 0.753 (2) Å]. There are no identified directional inter­actions in the crystal structure. International Union of Crystallography 2013-03-23 /pmc/articles/PMC3629621/ /pubmed/23634108 http://dx.doi.org/10.1107/S1600536813007253 Text en © Nisar et al. 2013 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Organic Papers
Nisar, Mohammad
Ali, Sajid
Tahir, M. Nawaz
Ahmad, Bashir
Hameed, Shahid
4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octa­deca­hydro-12b,8a-(epoxy­methano)­picen-3-yl acetate
title 4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octa­deca­hydro-12b,8a-(epoxy­methano)­picen-3-yl acetate
title_full 4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octa­deca­hydro-12b,8a-(epoxy­methano)­picen-3-yl acetate
title_fullStr 4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octa­deca­hydro-12b,8a-(epoxy­methano)­picen-3-yl acetate
title_full_unstemmed 4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octa­deca­hydro-12b,8a-(epoxy­methano)­picen-3-yl acetate
title_short 4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octa­deca­hydro-12b,8a-(epoxy­methano)­picen-3-yl acetate
title_sort 4,4,6a,6b,11,12,14b-heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octa­deca­hydro-12b,8a-(epoxy­methano)­picen-3-yl acetate
topic Organic Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3629621/
https://www.ncbi.nlm.nih.gov/pubmed/23634108
http://dx.doi.org/10.1107/S1600536813007253
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