An economic synthesis of 1,2,3,4-tetra-O-acetyl-5-thio-d-xylopyranose and its transformation into 4-substituted-phenyl 1,5-dithio-d-xylopyranosides possessing antithrombotic activity11Orally active antithrombotic thioglycosides, Part V. For Part IV see[1].22Presented partly at the 9th European Carbohydrate Symposium, Utrecht, 6–11 July 1997, Abstr. A16.