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N-pentenyl groups

Scheme 11.3 Using a C2-protecting group for arming/disarming of an n-pentenyl glycoside for oxonium ion formation. Scheme 11.3 Using a C2-protecting group for arming/disarming of an n-pentenyl glycoside for oxonium ion formation.
U. E. Udodong, C. S. Rao, and B. Fraser-Reid, n-Pentenyl glycosides in the efficient assembly of the blood group substance B tetrasaccharide, Tetrahedron 48 4713 (1992). [Pg.355]

TV-Bromosuccinirnide (NBS) and NIS are the most widely used electrophiles to activate -pentenyl glycosides. Catalytic amounts of acids such as TfOH or trieth-ylsilyl triflate (TESOTf) are introduced to speed up the generation of bromonium or iodonium ions [43], The stereochemical outcome depends, as usual, on whether a participating group exists at C2. An alternative promoter is iodonium dicollidine perchlorate (IDCP), whose lower reactivity allows it to selectively activate certain disarmed n-pentenyl glycosides [44],... [Pg.81]

See other pages where N-pentenyl groups is mentioned: [Pg.387]    [Pg.117]    [Pg.165]    [Pg.170]    [Pg.181]    [Pg.191]    [Pg.148]    [Pg.165]    [Pg.165]    [Pg.170]    [Pg.179]    [Pg.181]    [Pg.191]    [Pg.410]    [Pg.717]    [Pg.387]    [Pg.117]    [Pg.165]    [Pg.170]    [Pg.181]    [Pg.191]    [Pg.148]    [Pg.165]    [Pg.165]    [Pg.170]    [Pg.179]    [Pg.181]    [Pg.191]    [Pg.410]    [Pg.717]    [Pg.219]    [Pg.333]    [Pg.338]    [Pg.339]    [Pg.107]    [Pg.108]    [Pg.124]    [Pg.217]    [Pg.341]    [Pg.345]    [Pg.415]    [Pg.465]    [Pg.391]    [Pg.13]    [Pg.13]    [Pg.14]    [Pg.15]    [Pg.49]    [Pg.237]    [Pg.240]    [Pg.247]    [Pg.221]    [Pg.135]    [Pg.80]    [Pg.116]    [Pg.157]    [Pg.335]    [Pg.340]    [Pg.344]    [Pg.344]   
See also in sourсe #XX -- [ Pg.148 ]

See also in sourсe #XX -- [ Pg.148 ]



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N groups

Oligosaccharides from n-pentenyl blood group substance

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