Design, construction and properties of peptide N-terminal cap templates devised to initiate α-helices. Part 3.† Caps derived from N-[(2S )-2-chloropropionyl]-(2S )-Pro-(2R)-Ala-(2S,4S )-4-thioPro-OMe
作者:Arwel Lewis、Trevor J. Rutherford、John Wilkie、Thierry Jenn、David Gani
DOI:10.1039/a806032k
日期:——
template capable of entraining attached peptides in helical conformations from acyclic N-[(2S)-2-chloropropionyl]-(2S)-Pro-(2S)-Pro-(2S,4S)-4-thioPro-OMe precursors has been severely hampered by the problem of simultaneously aligning carboxamide dipoles in the transition state for cyclisation. Previously we provided a detailed conformationalanalysis of the system and tested two methods for forcing the acyclic
Design, synthesis, structure and properties of an α-helix cap template derived from N-[(2S)-2-chloropropionyl]-(2S)-Pro-(2R)-Ala-(2S,4S)-4-thioPro-OMe which initiates α-helical structures
作者:David Gani、Arwel Lewis、Trevor Rutherford、John Wilkie、Iain Stirling、Thierry Jenn、Martin D. Ryan
DOI:10.1016/s0040-4020(98)00991-0
日期:1998.12
were characterised by NMR spectroscopy and restrained simulated annealing. In deuterochloroform solution at low temperature, separate sets of NMR signals were observed for two rapidly interconverting helical conformational isomers of the thioether macrocycle which possessed an appended trialkylammonium ion. A similar time-averaged conformation was also observed in aqueous solution. At −80 °C in d2-dichloromethane