In the title compound, C 12 H 18 O 5 , the ring has a chair conformation, with endocyclic torsion angle magnitudes in the range 47.7 (3)-66.7 (2) . The OH group donates an intermolecular hydrogen bond to a C O group with an OÁ Á ÁO distance of 2.791 (3) A ˚, forming chains. organic papers o2662 Burt
(2aRS,3RS,4aSR,6aRS,6bSR)-3-Hydroxy-2a,3,4a,6,6a,6b-hexahydro-1,4-dioxacyclopenta[cd]pentalen-2(5H)-one
✍ Scribed by Peifer, Christian ;Schollmeyer, Dieter ;Tschertsche, Melanie ;Laufer, Stefan
- Publisher
- International Union of Crystallography
- Year
- 2007
- Tongue
- English
- Weight
- 373 KB
- Volume
- 63
- Category
- Article
- ISSN
- 1600-5368
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📜 SIMILAR VOLUMES
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.
## Abstract The synthesis of kempa‐6,8‐dien‐3__β__‐ol (**4a**), as a synthetic leading model of the natural product **4b**, was carried out starting from intermediate **12**, the synthetic route of which has been developed previously (__Scheme 1__). The conversion of **12** to the model compound **
Single-crystal X-ray study T = 295 K Mean (C-C) = 0.004 A R factor = 0.056 wR factor = 0.175 Data-to-parameter ratio = 12.9 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
Z-Substituted-1,2,3,4,5,6-hexahydro-3-bemwxine-4, 6diones(la-d) and 2-methoxy-2,5,6,7-tetrahydro+ benxamnine-1,3dione 8 were synthesii thro@ an oxklative ring expansion reaction of 6-methylthio-7-substiituted-benzo(a] octem (2a-d ) and 7-methylthio%-methoxy-benzo[a]nonem 7 with sodium periodate in i