TY  - JOUR
A1  - Tian, Guang-Zong
A1  - Hu, Jing
A1  - Zhang, Heng-Xi
A1  - Rademacher, Christoph
A1  - Zou, Xiao-Peng
A1  - Zheng, Hong-Ning
A1  - Xu, Fei
A1  - Wang, Xiao-Li
A1  - Linker, Torsten
A1  - Yin, Jian
T1  - Synthesis and conformational analysis of linear homo- and heterooligomers from novel 2-C-branched sugar amino acids (SAAs)
JF  - Scientific reports
N2  - Sugar amino acids (SAAs), as biologically interesting structures bearing both amino and carboxylic acid functional groups represent an important class of multifunctional building blocks. In this study, we develop an easy access to novel SAAs in only three steps starting from nitro compounds in high yields in analytically pure form, easily available by ceric (IV) mediated radical additions. Such novel SAAs have been applied in the assembly of total nine carbopeptoids with the form of linear homo-and heterooligomers for the structural investigations employing circular dichroism (CD) spectroscopy, which suggest that the carbopeptoids emerge a well-extended, left (or right)-handed conformation similar to polyproline II (PPII) helices. NMR studies also clearly demonstrated the presence of ordered secondary structural elements. 2D-ROESY spectra were acquired to identify i+1NH <-> (C1H)-C-i, (C2H)-C-i correlations which support the conformational analysis of tetramers by CD spectroscopy. These findings provide interesting information of SAAs and their oligomers as potential scaffolds for discovering new drugs and materials.
Y1  - 2018
U6  - https://doi.org/10.1038/s41598-018-24927-6
SN  - 2045-2322
VL  - 8
PB  - Nature Publ. Group
CY  - London
ER  -