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Crystal structure of (4bS,8aR)-1-isopropyl-4b,8,8-trimethyl-7-oxo-4b,7,8,8a,9,10-hexa-hydro-phenanthren-2-yl acetate.

ABSTRACT: The title compound, C22H28O3, was prepared by a direct acetyl-ation reaction of naturally occurring totarolenone. The mol-ecule contains three fused rings, which exhibit different conformations. The central ring has a half-chair conformation, while the non-aromatic oxo-substituted ring has a screw-boat conformation. In the crystal, mol-ecules are linked by C-H?O hydrogen bonds and C-H?? inter-actions, forming sheets parallel to the bc plane. The carbonyl O atoms and the C atom at the 6-position of the cyclo-hexene ring are each disordered over two sets of sites with major occupancy components of 0.63?(7) and 0.793?(14), respectively.

SUBMITTER: Laamari Y

PROVIDER: S-EPMC5947497 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Crystal structure of (4bS,8aR)-1-isopropyl-4b,8,8-trimethyl-7-oxo-4b,7,8,8a,9,10-hexa-hydro-phenanthren-2-yl acetate.

Laamari Yassine Y Ait Itto Moulay Youssef MY Riahi Abdelkhalek A Chevreux Sylviane S Auhmani Aziz A Ketatni El Mostafa EM

Acta crystallographica. Section E, Crystallographic communications 20180427 Pt 5

The title compound, C22H28O3, was prepared by a direct acetyl-ation reaction of naturally occurring totarolenone. The mol-ecule contains three fused rings, which exhibit different conformations. The central ring has a half-chair conformation, while the non-aromatic oxo-substituted ring has a screw-boat conformation. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds and C-H⋯π inter-actions, forming sheets parallel to the bc plane. The carbonyl O ...[more]

PMID: 29850101

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