A new fucose-type iminosugar in which the nitrogen is placed in the anomeric position was synthesized from D-ribose and was shown to be a potent inhibitor of alpha-fucosidase (Ki = 8.4 mu M).
Synthesis of Guanidines From Azides: A General and Straightforward Methodology In Carbohydrate Chemistry
作者:Andrés G. Santana、Cosme G. Francisco、Ernesto Suárez、Concepción C. González
DOI:10.1021/jo100876r
日期:2010.8.6
The ability of the guanidinylating reagent N′,N′′-diBoc-N-triflyl-guanidine (GN-Tf) to react with in situ formed free amines from azides in carbohydrate scaffolds was explored. This reaction proved to be an efficient method to prepare guanidine derivatives in a one-pot manner with good to excellent yields, either with primary or secondary azides with different substitution patterns. Labile protecting
Tandem Radical Fragmentation/Cyclization of Guanidinylated Monosaccharides Grants Access to Medium-Sized Polyhydroxylated Heterocycles
作者:Andrés G. Santana、Concepción C. González
DOI:10.1021/acs.orglett.0c03091
日期:2020.11.6
The fragmentation of anomeric alkoxyl radicals (ARF) and the subsequent cyclization promoted by hypervalent iodine provide an excellent method for the synthesis of guanidino-sugars. The methodology described herein is one of the few existing general methodologies for the formation of medium-sized exo- and endoguanidine-containing heterocycles presenting a high degree of oxygenation in their structure