Participation by Functional Groups in the Glycosyl Donor

Although remote substituents at positions other than C2 are of less importance, in some cases, especially at C6, they are strong enough to serve as participating groups 

SCHEME 3.2 Stereoselective glycosylation by using chiral auxiliaries. 

SCHEME 33 Synthesis of 3-mannosides via remote participation. Bn, benzyl Pic, picolinyl. 

The various ways in which functionalities in both the glycosyl donors and glycosyl acceptors contribute to the stereoselectivity of the glycosylation reaction are further described in Chapter 4. 

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