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(5α,7α)-7-Hydro­xy-4,4,7-tri­methyl­cholestan-3-one

✍ Scribed by Kooijman, Huub ;Spek, Anthony L.

Publisher
International Union of Crystallography
Year
2001
Tongue
English
Weight
209 KB
Volume
58
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title compound, C 30 H 52 O 2 , crystallizes with two molecules in the asymmetric unit. The independent molecules differ in the conformation of the side chain attached to C17. Hydrogen bonds link the molecules in an in®nite chain, graph-set C(8), parallel to the b axis.

📜 SIMILAR VOLUMES

4-(4-Chloro­phenyl)-1,7,7-tri­methyl-1,2
4-(4-Chloro­phenyl)-1,7,7-tri­methyl-1,2,3,4,5,6,7,8-octa­hydro­quinoline-2,5-dione
✍ Tu, Shujiang ;Zhu, Xiaotong ;Zhang, Jinpeng ;Xu, Jianing ;Wang, Qian 📂 Article 📅 2005 🏛 International Union of Crystallography 🌐 English ⚖ 130 KB

The title compound, C 18 H 20 ClNO 2 , has been synthesized by the reaction of 4-chlorobenzaldehyde, Meldrum's acid, dimedone and CH 3 NH 3 Cl(NaOAc) in ethanol under microwave irradiation. The pyridone ring adopts a screw-boat conformation and the cyclohexenone ring an envelope conformation.

4-(3,4-Methyl­ene­dioxy­phenyl)-7,7-di­m
4-(3,4-Methyl­ene­dioxy­phenyl)-7,7-di­methyl-5-oxo-3,4,5,6,7,8-hexa­hydro­coumarin
✍ Wu, Hui ;Shi, Daqing ;Chen, Jing ;Wang, Xiangshan ;Zhuang, Qiya ;Hu, Hongwen 📂 Article 📅 2003 🏛 International Union of Crystallography 🌐 English ⚖ 119 KB

Single-crystal X-ray study T = 296 K Mean '(C±C) = 0.002 A Ê R factor = 0.038 wR factor = 0.101 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.

3,7,7-Tri­methyl-1-phenyl-1,6,7,8-tetrah
3,7,7-Tri­methyl-1-phenyl-1,6,7,8-tetrahydro-5H-pyrazolo­[3,4-b]­quinolin-5-one
✍ Low, John Nicolson ;Mera, Jaime ;Quiroga, Jairo ;Cobo, Justo 📂 Article 📅 2003 🏛 International Union of Crystallography 🌐 English ⚖ 488 KB

The title compound, C 19 H 19 N 3 O, crystallizes in the space group P1, with Z H = 2. Weak CÐHÁ Á ÁN, CÐHÁ Á ÁO and CÐ HÁ Á Á% interactions link the molecules into ribbons.