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Pivaloyl group glycosylation

The high stereoselectivity can be explained again by means of the zinc complex A (see Scheme 3). The nucleophilic isonitrile attacks the glycosyl imine from the steri-cally less shielded Re-side. The bulky pivaloyl group at the 2-position and the formed zinc complex block the Si-side efficiently. The exchange of the pivaloyl for the acetyl group decreases the selectivity of the reaction (10 1 instead of 30 1) [13]. [Pg.115]

See other pages where Pivaloyl group glycosylation is mentioned: [Pg.182]    [Pg.49]    [Pg.25]    [Pg.133]    [Pg.438]    [Pg.252]    [Pg.48]    [Pg.112]    [Pg.190]    [Pg.215]    [Pg.220]    [Pg.468]    [Pg.226]    [Pg.460]    [Pg.475]    [Pg.547]    [Pg.643]    [Pg.53]    [Pg.657]    [Pg.14]    [Pg.179]    [Pg.202]    [Pg.454]    [Pg.590]    [Pg.226]    [Pg.75]    [Pg.159]    [Pg.657]    [Pg.3]    [Pg.216]    [Pg.174]    [Pg.311]    [Pg.157]    [Pg.49]    [Pg.25]    [Pg.51]    [Pg.102]    [Pg.255]    [Pg.45]    [Pg.98]    [Pg.298]    [Pg.304]    [Pg.73]    [Pg.74]    [Pg.111]    [Pg.121]   
See also in sourсe #XX -- [ Pg.6 , Pg.657 ]

See also in sourсe #XX -- [ Pg.657 ]

See also in sourсe #XX -- [ Pg.6 , Pg.657 ]

See also in sourсe #XX -- [ Pg.637 ]



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Glycosyl group

Pivaloyl

Pivaloyl group

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