[EN] NUCLEOTIDE DERIVATIVE, AND PHARMACEUTICAL COMPOSITION AND USE THEREOF [FR] DÉRIVÉ NUCLÉOTIDIQUE, COMPOSITION PHARMACEUTIQUE ASSOCIÉE ET SON UTILISATION [ZH] 一种核苷酸衍生物及其药物组合物和用途
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.
Chiral Recognition of Carboxylates by a Static Library of Thiourea Receptors with Amino Acid Arms
作者:Filip Ulatowski、Janusz Jurczak
DOI:10.1021/acs.joc.5b00403
日期:2015.5.1
Chiral recognition is based on a large network of very subtle interactions whose outcome is difficult to predict. A combinatorial approach is therefore the most suitable to search for the most efficient receptor and obtain a structure-enantioselectivity correlation. We synthesized a set of 12 receptors constructed with 1,9-diaminoantracene and alpha-amino acid esters, linked via thiourea groups. The association constants and enantioselectivities for the complexes with mandelate and N-acetylphenylalanine were determined by competitive NMR titrations. Association constants quite regularly depend on the substituents in the receptor structure, but the distribution of enantioselectivities across the library could not easily be rationalized.
[EN] LINEAR PEPTIDE ANTIBIOTCS<br/>[FR] ANTIBIOTIQUES À BASE DE PEPTIDES LINÉAIRES
申请人:RQX PHARMACEUTICALS INC
公开号:WO2015023898A1
公开(公告)日:2015-02-19
Provided herein are antibacterial compounds, wherein the compounds in some embodiments have broad spectrum bioactivity. The compounds provided herein can in other embodiments overcome the resistance conferred by single amino acid mutations at defined positions of bacterial Signal Peptidases (SPases) and in other embodiments provide for a broad spectrum of antibiotic bioactivity. Pharmaceutical compositions and methods for treatment using the compounds described herein are also provided.