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Selective removal of protecting groups

Me3SiI, CH3CN, 25-50°, 100% yield. Selective removal of protective groups is possible with this reagent since a carbamate, =NCOOCMe3, is cleaved in 6 min at 25° an aryl benzyl ether is cleaved in 100% yield, with no formation of 3-benzyltyrosine, in 1 h at 50°, at which time a methyl ester begins to be cleaved. [Pg.157]

Benzyl and triphenylmethyl ethers of carbohydrates are preferred over methyl ethers when selective removal of protecting groups is important. The relatively high nucleophilic activity of the 5-hydroxyl group in glycosides and 1,2-O-alkylidene derivatives of 4 permits its benzylation and triphenylmethylation under mild conditions. Thus, treatment of 33 (Ref. 34) and 36 (Ref. 57) with benzyl bromide and... [Pg.202]

THE SELECTIVE REMOVAL OF PROTECTING GROUPS IN CARBOHYDRATE CHEMISTRY... [Pg.13]

A. H. Haines, The selective removal of protecting groups in carbohydrate chemistry, Adv. Carbokydr. Chan. Biochem. 39 13 (1981). [Pg.30]

Selective Removal of Protecting Groups in Carbohydrate Chemistry. Haines. A. H. Adv. Carbohydr Chem. Biochem. 1982, 59, 13 ... [Pg.187]

See other pages where Selective removal of protecting groups is mentioned: [Pg.150]    [Pg.93]    [Pg.180]    [Pg.15]    [Pg.17]    [Pg.19]    [Pg.21]    [Pg.23]    [Pg.25]    [Pg.27]    [Pg.29]    [Pg.31]    [Pg.33]    [Pg.35]    [Pg.37]    [Pg.39]    [Pg.41]    [Pg.43]    [Pg.45]    [Pg.47]    [Pg.49]    [Pg.51]    [Pg.53]    [Pg.55]    [Pg.57]    [Pg.59]    [Pg.63]    [Pg.65]    [Pg.67]    [Pg.69]    [Pg.512]    [Pg.834]    [Pg.150]    [Pg.119]    [Pg.137]   
See also in sourсe #XX -- [ Pg.39 ]



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Factors governing selectivity in removal of protecting groups

Group selectivity

Protecting groups, removal

Protective groups selection

Protective groups selective

Protective groups, removal

Protective groups, removal selective

Protective removal, selective

Removal of protecting groups

Selection group

Selective protection

Selectivity in removal of protecting groups

The Selective Removal of Protecting Groups in Carbohydrate Chemistry

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