title: Fluorinated carbohydrates as potential plasma membrane modifiers and inhibitors. Synthesis of 2-acetamido-2,6-dideoxy-6-fluoro-D-galactose.
abstract: Reaction of benzyl 2-acetamido-3,4-di-O-benzyl-2-deoxy-6-O-mesyl-alpha-D-galactopyran oside with cesium floride gave benzyl 2-acetamido-3,6-anhydro-4-O-benzyl-2-deoxy-alpha-D-galactopyranoside instead of the desired 6-fluoro derivative. Acetonation of benzyl 2-acetamido-2-deoxy-6-O-mesyl-alpha-D-galactopyranoside gave the corresponding 3,4-O-isopropylidene derivative. The 6-O-mesyl group was displaced by fluorine with cesium fluoride in boiling 1,2-ethanediol, and hydrolysis and subsequent N-acetylation gave the target compound. In another procedure, treatment of 2-acetamido-1,3,4-tri-O-acetyl-2-deoxy-alpha-D-galactose with N-(diethylamino)sulfur trifluoride gave 2-acetamido-1,3,4-tri-O-acetyl-2,6-dideoxy-6-fluoro-D-galactose which, on acid hydrolysis followed by N-acetylation, gave 2-acetamido-2,6-dideoxy-6-fluoro-D-galactose.
mesh_terms: D002462:Cell Membrane / Q000187:drug effects*; D005643:Fucose / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D009904:Optical Rotation; D013055:Spectrophotometry, Infrared; D013329:Structure-Activity Relationship
chemical_list: D007202:Indicators and Reagents; C052854:2-acetamido-2,6-dideoxy-6-fluorogalactose; D005643:Fucose