Stable supramolecular helical structure of C6-symmetric hydrogen-bonded hexakis(phenylethynyl)benzene derivatives with amino acid pendant groups and their unique fluorescence properties
The invention provides novel nucleoside compounds of formula I wherein R
1
, R
2a
, R
2b
, R
3
, R
4
, R
5
, R
6
, R
8a
, R
9
and R
10
are as defined herein which are useful for the treatment of Hepatitis C Virus (HCV) mediated diseases. The invention further provides methods for treatment or prophylaxis of HCV mediated diseases with compounds of formula I and pharmaceutical compositions comprising these compounds,
Efficient Microwave-Assisted Synthesis of Ionic Esterified Amino Acids
作者:Ricardo Cerón-Camacho、Jorge Aburto、Luisa E. Montiel、Eugenio A. Flores、Frisia Cuellar、Rafael Martínez-Palou
DOI:10.3390/molecules16108733
日期:——
In this work, an efficient microwave-assisted methodology for the esterification of unprotected α-amino acids is described. Ionic esterified amino acids were synthesized in satisfactory yields in a facile one-pot solventless protocol from unprotected amino acids and alcohols under acid catalysis (MsOH or p-TsOH) to afford the pure products after a simple work-up procedure. This procedure can also be extended to the preparation of long and short chain alkyl and benzyl esters.