The kinetic anomeric effect has been used to control both α and β stereoselectivity in glycosidation reactions. Depending on the restricted conformation 4C1 or 1C4 of the substrate, the anomeric α (1→2) or β product (3→4) was obtained highly stereoselectively from the Lewis acid promoted anomeric allylation with allyltrimethylsilane (TIPS=triisopropylsilyl).
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Tamura et al. (2003) studied this question.
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