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. 2021 Aug 5;17:1981–2025. doi: 10.3762/bjoc.17.129

Figure 11.

Figure 11

A) The DTBS PG stabilizes the 3H4 conformation of the Gal oxocarbenium ion favoring the attack of the alcohol from the α-face in a SN1 manner. B) Key BBs used in the synthesis of galactosaminogalactans bearing the α-directing DTBS PG.