Structural biochemistry. 26. Antineoplastic agents. 111. Synthesis of the modified dolastatin 3 sequence cyclo-[L-Val-L-Leu-L-Pro-(R,S)-(gln)Thz-(gly)Thz]
β Scribed by Pettit, George R.; Holzapfel, Cedric W.
- Book ID
- 127251634
- Publisher
- American Chemical Society
- Year
- 1986
- Tongue
- English
- Weight
- 531 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0022-3263
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π SIMILAR VOLUMES
Ah&act: Dolastatin 3, a unique cyclic peptide, was synthesised in hi h yield. Its minimum energy conformation in solution was established by NMR spectroscopy and force ield calculations, and is character&d k by three intramolecular hydrogen bonds.
## Abstract The cyclic peptide cyclo[βLβProβLβLeuβDβ(Gln)Thzβ(Gly)ThzβLβValβ] (1a), which is a diastereomer of the antineoplastic agent dolastatin 3 (1b), and contains the unusual thiazole amino acids, was synthesized. All the peptide bonds of the cyclic peptide 1a are __trans__ in solution, and th