“…Earlier achievements along the line have been summarized in some review articles [149][150][151]. The main approaches to 2-deoxypyranoses and their glycosides utilize glycals as the substrates, exploiting various electrophilic addition modes, which have been systematically covered in reviews devoted to these cyclic vinyl ethers of sugar origin [152][153][154]. There are many variants of electrophilic addition modes, widely exploited in 2-deoxy glycoside synthesis from glycals, e.g., (i) protic acid-catalyzed α-selective addition of an acceptor, usually catalyzed by TPPH [155]; (ii) NIS or phenylsuphanyl chloride-catalyzed addition, which usually leads to a mixture of 2-deoxy-2-substituted glycosides [155][156][157][158].…”