Enzymatic and Organocatalyzed Asymmetric Aldolization Reactions for the Synthesis of Thiosugar Scaffolds
作者:Johan Fanton、Flora Camps、José A. Castillo、Christine Guérard-Hélaine、Marielle Lemaire、Franck Charmantray、Laurence Hecquet
DOI:10.1002/ejoc.201101137
日期:2012.1
We studied the synthesis of original thiosugar scaffolds by enantioselective aldolization. L-Proline-catalyzed C-C bond formation was the key step in the synthesis of L-erythro-thioketoses (3S,4R), whereas fructose-6-phosphate aldolase-catalyzed reactions yielded the D-threo-thioketose series (3S,4S). By the organocatalytic approach, 5-thio-L-ribulofuranose (1) and 5-deoxy-6-thio-L-psicopyranose (2)