- Chemical and Ribosomal Synthesis of Topologically Controlled Bicyclic and Tricyclic Peptide Scaffolds Primed by Selenoether Formation
-
Bicyclic and tricyclic peptides have emerged as promising candidates for the development of protein binders and new therapeutics. However, convenient and efficient strategies that can generate topologically controlled bicyclic and tricyclic peptide scaffolds from fully-unprotected peptides are still much in demand, particularly for those amenable to the design of biosynthetic libraries. In this work, we report a reliable chemical and ribosomal synthesis of topologically controlled bicyclic and tricyclic peptide scaffolds. Our strategy involves the combination of selenoether cyclization followed by disulfide or thioether cyclization, yielding desirable bicyclic and tricyclic peptides. This work thus lays the foundation for developing peptide libraries with controlled topology of multicyclic scaffolds for in vitro display techniques.
- Yin, Yizhen,Fei, Qianran,Liu, Weidong,Li, Zhuoru,Suga, Hiroaki,Wu, Chuanliu
-
-
Read Online
- PCl3-mediated synthesis of green/cyan fluorescent protein chromophores using amino acids
-
Convenient synthesis involving aromatic amino acids, acetyl chlorides, and anilines in the presence of phosphorous trichloride has been established for the rapid synthesis of functionalized imidazolinones. With all the starting materials which are commercially available, low cost and stable, the construction of the target products has been accomplished via tandem transformations involving a key C-N coupling process, leading to the formation of two C(sp2)-N, one C=N, and one C=C bonds.
- Singh, Thokchom Prasanta,Shunmugam, Raja
-
supporting information
p. 3024 - 3027
(2016/05/09)
-
- Synthesis of 3,4-Bridged Indoles by Photocyclisation Reactions. Part 1. Photocyclisation of Halogenoacetyl Tryptophan Derivatives
-
Although irradiation of N-chloroacetyltryptophan results in a poor yield of photocyclisation to the indole 4-position due to competing cyclisation to C-2, the photocyclisation of (dichloroacetyl)tryptophan derivatives gives, after addition of a nucleophile in work-up, 7-substituted pyrrolobenzazocines in good yield and with trans-stereospecificity.N-(Trichloroacetyl)tryptophan derivatives also undergo photocyclisation to give 3,4-bridged indoles.The structures of the azocinoindoles 13, 21, 22 and 35, and the azepinoindole 15 were confirmed by X-ray crystallography.In one case the preparation of a cycloalkaindole was possible by the irradiation of the α-chloro amide of an indol-3-yl alkanoic acid.
- Beck, Anthony L.,Mascal, Mark,Moody, Christopher J.,Slawin, Alexandra M. Z.,Williams, David J.,Coates, William J.
-
p. 797 - 812
(2007/10/02)
-
