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Glycosyl acetate

Apart from glycosyl acetate and benzoate donors, more elaborate O-carbonyl derivatives offer potential for distinct modes of anomeric leaving group activation. Many of these donors (Scheme 3.21) involve activation of an anomeric O-carbonyl derivative 134 at a remote functional group (Y). The adivated remote functionality, in turn,... [Pg.141]

Representative Procedure for Lewis Acid Promoted Clycosylation with Glycosyl Acetate Donors Using SnCI4 [198]... [Pg.150]

Glycosyl acetates. Reaction of l-0-acetyl-2,3,5-tri-0-benzyl-D-ribofuranose (99) with various enoxysilanes in the presence of TrC104 afforded 1,2-czj-C-glycosyl compounds with high stereoselectivity and yields higher than 90% (Scheme 34).106... [Pg.52]

Glycosyl bromides.1 Glycosyl bromides can be prepared conveniently and in High yield by reaction of bromotrimethylsilane with anomcric glycosyl acetates. Ulter groups at other positions are stable under the mild conditions (25°, HCC13, 4II min) employed. Methyl glycosides can also be used, but 1,2-O-isopropylidenes rend very slowly. [Pg.59]

A. Friedel-Crafts-type C-glycosidation of glycosyl acetates 535... [Pg.527]

D. C-Glycosidation of Glycosyl Acetates (Digltoxosylation) by Using SnCI4 as the Promoter [11b]... [Pg.537]

See other pages where Glycosyl acetate is mentioned: [Pg.37]    [Pg.8]    [Pg.80]    [Pg.81]    [Pg.99]    [Pg.136]    [Pg.136]    [Pg.136]    [Pg.138]    [Pg.138]    [Pg.139]    [Pg.139]    [Pg.140]    [Pg.141]    [Pg.147]    [Pg.150]    [Pg.307]    [Pg.307]    [Pg.369]    [Pg.369]    [Pg.369]    [Pg.371]    [Pg.100]    [Pg.107]    [Pg.44]    [Pg.49]    [Pg.64]    [Pg.64]    [Pg.339]    [Pg.342]    [Pg.349]    [Pg.527]    [Pg.527]    [Pg.531]    [Pg.538]    [Pg.47]    [Pg.349]    [Pg.65]    [Pg.184]   
See also in sourсe #XX -- [ Pg.525 , Pg.526 ]



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Glycosylations acetate

Use of anomeric acetates as glycosyl donors

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