Abstract The three monodeoxymonofluoroglycerols have been synthesised stero- specifically. 2-Deoxy-2-fluoroglycerol (4) was prepared in four steps from glycerol by using a fluoride-ion displacement of the sulphonyloxy group from 2-Op-tolylsulphonyl-1, 3-di-O- tritylglycerol. 1-Deoxy-1-fluoro-d-and l-glycerol (8 and 13) were synthesised in five and eight steps, respectively, from d-mannitol. 1-Deoxy-1-fluoro-d-glycerol (8) resulted from fluoride- ...