Molecular Discrimination of <i>N-</i>Protected Amino Acid Esters by a Self-Assembled Cylindrical Capsule: Spectroscopic and Computational Studies
作者:Osamu Hayashida、Lubomir Sebo、Julius Rebek
DOI:10.1021/jo0201171
日期:2002.11.1
A self-assembled, cylindrical capsule was used to bind N-alpha-protected amino acid esters. The reversible encapsulation was studied using NMR spectroscopy in deuterated mesitylene solution and by computer-aided molecular modeling. BOC-L-alanine alkyl esters and BOC-beta-alanine alkyl esters were tested as guests, and the relative binding affinities were established by direct competition experiments. A good correlation was found between the experimental and calculated relative binding affinities in these two series. Guests that were slightly longer than the internal dimensions of the cavity were accommodated by adopting compacted conformations.
ANTIVIRAL COMPOUNDS
申请人:Gilead Sciences, Inc.
公开号:US20210284670A1
公开(公告)日:2021-09-16
The present disclosure provides compounds for treating a variety of diseases, such as respiratory syncytial virus (RSV), HRV, hMPV, Ebola, Zika, West Nile, Dengue, and HCV.
The present disclosure provides compounds for treating a variety of diseases, such as respiratory syncytial virus (RSV), HRV, hMPV, Ebola, Zika, West Nile, Dengue, and HCV.
Ceric ammonium nitrate (CAN) mediated esterification of N-Boc amino acids allows either retention or removal of the N-Boc group
作者:Ashani Kuttan、Shiek Nowshudin、M.N.A. Rao
DOI:10.1016/j.tetlet.2004.01.136
日期:2004.3
Reaction of N-Boc amino acids with ceric ammonium nitrate in an alcohol as the solvent at room temperature resulted in the esterification of N-Boc amino acids with Boc group retention. When the reaction was conducted at reflux temperature, esterification was accompanied with simultaneous removal of the Boc group. Both reactions gave the desired products in good yields. (C) 2004 Elsevier Ltd. All rights reserved.