作者:Andrew W. Wijaya、Andy I. Nguyen、Leah T. Roe、Glenn L. Butterfoss、Ryan K. Spencer、Nan K. Li、Ronald N. Zuckermann
DOI:10.1021/jacs.9b10497
日期:2019.12.11
side-chains demonstrates significant enforcement of the cis-amide backbone (Kcis/trans up to 70) using an unexpected ensemble of weak intramolecular CH-O and/or NH-O hydrogen bonds between the side-chain and the backbone carbonyl moieties. These interactions are evidenced by X-ray crystallography, variable-temperature NMR spectroscopy, and DFT calculations. Moreover, these side-chains are inexpensive