DC-SIGN and Langerin are two C-type lectins involved in the initial steps of HIV infections: the former acts as a viral attachment factor and facilitates viral invasion of the immune system, the latter has a protective effect. Potential antiviral compounds targeted against DC-SIGN were synthesized using a common fucosylamide anchor. Their DC-SIGN affinity was tested by SPR and found to be similar to that of the natural ligand Lewis-X (LeX). The compounds were also found to be selective for DC-SIGN and to interact only weakly with Langerin. These molecules are potentially useful therapeutic tools against sexually transmitted HIV infection.
A variety of thiolesters was conveniently prepared from thiols and carboxylic acids using ethyl 3-(dimethylamino)propyl carbodiimide (EDAC) on a solidsupport in good to high yield for primary and aryl thiolesters with lower yields for secondary and tertiary thiolesters.
Amino-acids and peptides. Part XXXIV. Anchimerically assisted coupling reactions: the use of 2-pyridyl thiolesters
作者:K. Lloyd、G. T. Young
DOI:10.1039/j39710002890
日期:——
presented of the use in peptide synthesis of esters for which aminolysis is assisted by a neighbouring group. 2-Pyridylthiolesters of phthaloyl-, benzyloxycarbonyl-, and t-butoxycarbonyl-amino-acids are described, and it is shown that they condense very rapidly even with hindered amino-esters to give high yields of protected dipeptides. Phthaloyl-L-phenylalanine pyrimidin-2-yl thiolester is also described