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trans-2,2-Di­methyl-6-phenyl-3,4,5,6-tetra­hydro-2H-pyran-3-ol

✍ Scribed by Hartung, Jens ;Svoboda, Ingrid ;Schmidt, Philipp ;Murso, Alexander

Publisher
International Union of Crystallography
Year
2004
Tongue
English
Weight
127 KB
Volume
61
Category
Article
ISSN
1600-5368

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✍ Krishnamoorthy, Belli Sundaram ;Sarangarajan, Thanjavur Ramabhadran ;Thanikasala 📂 Article 📅 2003 🏛 International Union of Crystallography 🌐 English ⚖ 375 KB

The crystal and molecular structure of the title compound, C 19 H 20 Cl 2 O 2 , reveals a chair conformation for the pyran ring in which the hydroxyl group is axially oriented. All the other substituents occupy equatorial positions. There are two molecules in the asymmetric unit.

3-(Imidazolidin-2-yl­idene)-6-methyl-3,4
3-(Imidazolidin-2-yl­idene)-6-methyl-3,4,5,6-tetra­hydro-2H-pyran-2,4-dione
✍ Hao, Jing-Jun ;Xu, Hu ;Song, Hai-Bing ;Wang, You-Ming ;Li, Zheng-Ming 📂 Article 📅 2005 🏛 International Union of Crystallography 🌐 English ⚖ 135 KB

The title compound, C 9 H 12 N 2 O 3 , was synthesized by the reaction in ethanol of ethane-1,2-diamine and 3-[bis(methylthio)methylene]-6-methyl-3,4,5,6-tetrahydro-2H-pyran-2,4dione. Two intramolecular N-HÁ Á ÁO hydrogen bonds induce a high degree of planarity.