The relative con®guration of the title compound, C 18 H 27 NO 4 , was determined as being R,S,S,S. There are three crystallographically independent molecules in the asymmetric unit, which show only slight conformational differences. Molecules in the crystal structure are connected by hydrogen bonds
(2S*,3R*,4S*,5R*)-3-(S*-1-Benzyloxyethyl)-4-methyl-4-nitro-5-phenylproline methyl ester
✍ Scribed by Linden, Anthony ;Ayerbe, Mirari ;Arrieta, Ana ;Zubia, Aizpea ;Vivanco, Silvia ;Erquicia, Edurne ;Aldaba, Eneko ;Cossío, Fernando P. ;Lecea, Begoña
- Publisher
- International Union of Crystallography
- Year
- 2001
- Tongue
- English
- Weight
- 273 KB
- Volume
- 57
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
At 173 K, the ®ve-membered ring of the title compound, C 22 H 26 N 2 O 5 , has an envelope conformation. The amine group is involved in both intramolecular and intermolecular hydrogen bonds, the latter linking the molecules into centrosymmetric dimers.
Experimental
The title compound was prepared according to the procedure of Ayerbe et al. (1998). The reaction gave a mixture of three diastereoisomers, (3a±c), in the proportions 59:29:12, which were separated
📜 SIMILAR VOLUMES
Single-crystal X-ray study T = 150 K Mean '(C±C) = 0.009 A Ê R factor = 0.060 wR factor = 0.150 Data-to-parameter ratio = 12.6 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e.
In the title compound, C 19 H 19 NO 3 , formed from enantiomerically pure (+)-(4R,5S)-4-methyl-5-phenyl-2-oxazolidinone and racemic 2-phenylpropanoyl chloride, the two carbonyl groups are oriented anti to each other, and the two methyl groups are oriented anti to each other.