Structure analysis of 3β-chloro-6-nitrocholest-5-ene
✍ Scribed by Rajnikant; V. K. Gupta; J. Firoz; Shafiullah; R. Gupta
- Book ID
- 110126992
- Publisher
- SP MAIK Nauka/Interperiodica
- Year
- 2001
- Tongue
- English
- Weight
- 54 KB
- Volume
- 46
- Category
- Article
- ISSN
- 1063-7745
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Although most cholestenes of the 56 series have been throughly investigatea' only few informations can be found in the literature about the analogous 5P-derivatives. It has been reported, for instance, that 5)3-cholestan-3/j-01 tosylate is transformed by alumina into 5P-cholest-2-ene,' and that the
In the title molecule, C 22 H 29 ClO 4 , all bond lengths and angles show normal values. Rings A and C have slightly distorted chair conformations, while rings B and D show envelope conformations. Weak intermolecular C-HÁ Á ÁO hydrogen bonds link the molecules into chains running along the b axis.
The X-ray crystal structure of 3~-benzoyloxy-6a-chloro-5a-cholest-7-ene (IV) was determined by the heavy atom method and ref'med to R ---0.063 (space group P2s, a --11.364, b = 11.089, c --12.232,/~ = 99.43 °, Z ---2). IV was previously shown to be an important intermediate in the acid-catalyzed iso