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16-(2-Pyridyl­methyl­ene)­androst-4-ene-3,17-dione

✍ Scribed by Vasuki, G. ;Thamotharan, S. ;Parthasarathi, V. ;Ramamurthi, K. ;Dubey, S. ;Jindal, D. P.

Publisher
International Union of Crystallography
Year
2002
Tongue
English
Weight
225 KB
Volume
58
Category
Article
ISSN
1600-5368

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16-(3-Pyridyl­methyl­ene)­androst-4-ene-
16-(3-Pyridyl­methyl­ene)­androst-4-ene-3,17-dione
✍ Vasuki, G. ;Parthasarathi, V. ;Ramamurthi, K. ;Dubey, S. ;Jindal, D. P. 📂 Article 📅 2002 🏛 International Union of Crystallography 🌐 English ⚖ 183 KB

In the title compound, C 25 H 29 NO 2 , ring A adopts a slightly distorted half-chair conformation, while rings B and C are in chair conformations. The ®ve-membered ring D adopts a 13,14-half-chair conformation. The 3-pyridyl ring has an E con®guration with respect to the carbonyl group at position

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3β,17β-Di­acetoxy-16-(2-pyridyl­methyl­ene)androst-5-ene hydrate (1/0.46)
✍ Vasuki, G. ;Parthasarathi, V. ;Ramamurthi, K. ;Dubey, S. ;Jindal, D. P. 📂 Article 📅 2002 🏛 International Union of Crystallography 🌐 English ⚖ 186 KB

In the title compound, C 29 H 37 NO 4 Á0.46H 2 O, rings A and C adopt chair conformations and ring B is in a half-chair conformation. The ®ve-membered ring D adopts an envelope conformation. The crystal structure is stabilized by weak intermolecular CÐHÁ Á ÁO interactions and van der Waals forces.

3-(Methyl­amino­methyl­ene)pentane-2,4-d
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✍ Gróf, Martin, ;Milata, Viktor ;Kožíšek, Jozef ;Tokarčík, Miroslav 📂 Article 📅 2006 🏛 International Union of Crystallography 🌐 English ⚖ 121 KB

Single-crystal X-ray study T = 100 K Mean (C-C) = 0.002 A R factor = 0.061 wR factor = 0.165 Data-to-parameter ratio = 14.3 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.

3-(Amino­methyl­ene)pentane-2,4-dione
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✍ Gróf, Martin, ;Milata, Viktor ;Kožíšek, Jozef 📂 Article 📅 2006 🏛 International Union of Crystallography 🌐 English ⚖ 161 KB

The orientations of NH 2 and CH 3 of the title compound, C 6 H 9 NO 2 , are mainly stabilized by N-HÁ Á ÁO and C-HÁ Á ÁO intramolecular hydrogen bonds, as well as intermolecular N-HÁ Á ÁO and C-HÁ Á ÁO hydrogen bonds.