The absolute configuration has been determined for the title compound, C 14 H 18 N 2 O 6 S, a fluorescent dipeptide analogue, which can act as a rigid backbone chromophore in peptides. Intermolecular N-HÁ Á ÁO C hydrogen bonds [HÁ Á ÁO = 2.37 (2) A ˚] are observed in the crystal packing.
(3R)-Methyl 6-tert-butoxycarbonylamino-5-oxo-2,3-dihydro-5H-1,3-thiazolo[3,2-a]pyridine-3-carboxylate
✍ Scribed by Seger, Harald ;Stempfhuber, Sabine ;Zabel, Manfred ;Marsch, Michael ;Geyer, Armin ;Harms, Klaus
- Publisher
- International Union of Crystallography
- Year
- 2005
- Tongue
- English
- Weight
- 154 KB
- Volume
- 61
- Category
- Article
- ISSN
- 1600-5368
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✦ Synopsis
The absolute configuration has been determined for the title compound, C 14 H 18 N 2 O 5 S, a bicyclic aromatic building block which can act as a rigid fluorescence marker in peptide backbones. In the crystal packing, the two independent molecules of the asymmetric unit are aligned in an antiparallel manner as dimers which are stabilized by antiparallel intermolecular N-HÁ Á ÁO C hydrogen bonds. In addition, there are weak intermolecular C-HÁ Á ÁO interactions.
📜 SIMILAR VOLUMES
In the title compound, C 13 H 14 N 2 O 2 S, intermolecular N-HÁ Á ÁO(N) hydrogen bonds link the molecules in the crystal structure into sheets parallel to the bc plane.
In the title compound, C 23 H 19 ClN 2 O 3 S, the central pyrimidine ring is significantly puckered, assuming an intermediate conformation between an envelope and a screw-boat form. Short intermolecular C-HÁ Á ÁO, C-HÁ Á Á andstacking interactions contribute to the stability of the crystal packing.
The title compound, C~25~H~24~N~2~O~3~S~3~, was crystallized from a methanol–acetone mixture. The monoclinic structure features one molecule in the asymmetric unit. The crystal packing is stabilized by π stacking.
Synthesis and absolute configuration of methyl