Abstract Anomeric O-alkylation of mannopyranoses with various protecting groups was investigated using mannose derivatives and 2, 3-O-isopropylidene-lO-trifluoro- methanesulfonyl-D-glycerol (1) as alkylating agent. Generally, in polar solvents higher α/β ratios were obtained than in nonpolar solvents. Sterically demanding protecting groups at the 6-O-position and polar solvents led to higher yields. Reactivity differences were ...
![1,6-Anhydro-2,3-di-O-benzyl-4-O-[(trifluormethyl)sulfonyl]-β-D-galactopyranose Structure](https://image.chemsrc.com/caspic/254/104976-44-5.png)
![(2R,3S,4S,5S,6R)-2-(((1R,2S,3R,4R,5R)-3,4-dihydroxy-6,8-dioxabicyclo[3.2.1]octan-2-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol Structure](https://image.chemsrc.com/caspic/211/2672-63-1.png)