Three conformers in a crystal of N-Ac-l-Leu-l-Tyr-OMe
β Scribed by Karle, I. L. ;Flippen-Anderson, J. L.
- Book ID
- 114506139
- Publisher
- International Union of Crystallography
- Year
- 1989
- Tongue
- English
- Weight
- 542 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0108-2701
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π SIMILAR VOLUMES
The peptide N-Boc-L-Phe-dehydro-Leu-L-Val-OCH3 was synthesized by the usual workup procedure and finally by coupling the N-Boc-L-Phe-dehydro-Leu-OH to valine methyl ester. It was crystallized from its solution in methanol-water mi5ture a t 4Β°C. The crystals belong to the triclinic space group P1 wit
The peptide N-Boc-L-Pro-dehydro-Leu-OCH3 was synthesized by coupling dehydroleucine methyl ester with Boc-Pro-OH. It was crystallized from its solution in a methanol-water mixture at 4Β°C and the crystals belong to the orthorhfmbic space group P2,2,2, with a = 10.239( 1) A, b = 19.276(4) A, c = 20.31
## Abstract BocβLβAlaβAibβLβOMe (**1**) crystallizes in the space group __P__2~1~ with __a__ = 11.732(1), __b__ = 6.013(1), __c__ = 14.195(2) Γ , Ξ² = 91.76(1)β, and Z = 2(__R__ value for 3089 reflexions: 0.047). The peptide adopts a new type of Ξ²βturn with a very wide 4β1 hydrogen bond distance of 3