Synthesis and Structural Studies of Homooligomers of Geminally Disubstituted β<sup>2,2</sup>-Amino Acids with Carbohydrate Side Chain
作者:Gangavaram V. M. Sharma、Post Sai Reddy、Deepak Chatterjee、Ajit C. Kunwar
DOI:10.1021/jo101763t
日期:2011.3.18
A new class of geminally disubstituted C-linked carbo-β2,2-amino acids (β2,2-Caa) were prepared from d-glucose. The structures of homooligomeric di-, tetra-, and hexapeptides prepared from (S)-β2,2-Caa were studied with NMR (in CDCl3), CD, and Molecular Dynamics calculations. These β2,2-peptides have shown the presence of stable 6-membered (6-mr) NH(i)···CO(i) intra-residue H-bonded (C6) strands. It
一类新的偕二取代的C-连接的碳氮化β 2,2 α-氨基酸(β 2,2- -Caa)从制备d -葡萄糖。从(制备homooligomeric二- ,四- ,和六肽的结构小号)-β 2,2进行了研究用NMR -Caa(在CDCl 3),CD,和分子动力学的计算。这些β 2,2 -肽已经显示稳定的6元(6-MR)的存在NH(我)... CO(我)内残基H-键合(C 6)链。已发现,由于酰胺质子(NH(i))到糖环C3碳上的前一个甲氧基(O(Me)(i -1))的氧。新的β 2,2与到H-接合额外的支撑-Caa残基相当扩大foldamers的域。