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4-Chloro-2-{(E)-[(1R,4aS,10aR)-7-isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octa­hydro­phenanthren-1-yl]methyl­imino­meth­yl}phenol

✍ Scribed by Rao, Xiao-Ping ;Song, Zhan-Qian ;Gong, Yun ;Yao, Xu-Jie ;Shang, Shi-Bin

Publisher
International Union of Crystallography
Year
2006
Tongue
English
Weight
156 KB
Volume
62
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title compound, C 27 H 34 ClNO, was synthesized by a direct condensation reaction. The molecule has three chiral centres, which exhibit R, S and R absolute configurations, respectively. Two six-membered rings with different conformations coexist in the structure and they form a trans ring junction with two methyl groups in axial positions.

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The title diterpene, C 19 H 24 O 4 , which was totally synthesized from geranic acid, has the tricyclic backbone of a podocarpic diterpene. The skeleton does not show a planar configuration, but is distinctly bent.

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The absolute configuration of the title tetracyclic bis-oxazine, C 14 H 17 N 3 O 5 S, has been determined. It is an unexpected product from the attempt to synthesize a new class of bisoxazolines. The seven-membered lactam ring exhibits four axial (O and N) and one equatorial (S) substituents. The or