Sequential glycosylation

The one-pot sequential glycosylation strategy is applied to the convergent total synthesis of the Fla antigen (Scheme 2.22) [105]. The glycosyl fluoride 68 is first... 

Moreover, the one-pot sequential glycosylation method has been applied successfully to the rapid assembly of a branched heptasaccharide 73 (Scheme 2.23) [106],... 

Finally, a novel sequential glycosylation procedure has been reported using 1-hydroxyl and thioglycosyl donors [230], Yamago et al. reported a broad substrate scope utilizing the BSP/Tf20 promoter system to preactivate thioglycosyl donors... 

Construction of the pseudohexasaccharide core (Scheme 13.18) involved the sequential glycosylations with mannosyl trichloroacetimidates 117, 118, and 119,... 

Codee JDC, Litjens REJN, van den Bos LJ, Overkleeft HS, van der Marel GA. Thioglycosides in sequential glycosylation strategies. Chem. Soc. Rev. 2005 34 769-782. 

Chiba, H, Mukaiyama, T, Highly a-stereoselective one-pot sequential glycosylation using glucosyl thioformimidate derivatives, Chem. Lett., 32, 172-173, 2003. 

Sequential Glycosylations with Different Types of Glycosyl Donors... 

SCHEME S.9 Block synthesis by sequential glycosylations with different t3rpes of glycosyl donors. 

In the traditional approaches of oligosaccharide synthesis, the product of a glycosylation reaction had to be isolated and it required some chemical transformation(s) to make it suitable for the next glycosylation reaction. In some of the synthetic strategies described in Section 5.4, such as in the sequential glycosylations and in the armed-disarmed glycosylations, the product of one... 

SCHEME S.31 One-pot sequential glycosylation using different types of glycosyl donors. 

Yamada, H, Kato, T, Takahashi, T, One-pot sequential glycosylation a new method forthe s3mthesis of branched ohgosaccharides. Tetrahedron Lett., 40, 4581-4584, 1999. 

H. Tanaka, N. Matoba, H. Tsukamoto, H. Takimoto, H. Yamada, and T. Takahashi, Automated parallel synthesis of a protected oligosaccharide library based upon the structure of dimeric Lewis X by one-pot sequential glycosylation, SYNLETT, (2005) 824—828. 

One-pot techniques combining two or more (chemo)selective glycosylation steps have been developed. One-pot strategies offer the shortest pathway to oligosaccharides, as the sequential glycosylation reactions are performed in a single flask (pot) and... 

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