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Of glycals

Scheme 8.41 Utilization of glycals and a-glycal epoxides in carbohydrate chemistry. Scheme 8.41 Utilization of glycals and a-glycal epoxides in carbohydrate chemistry.
Evans developed a new method for the synthesis of [(-C-allylglycosides, based on BusSnOTf-mediated ring-opening of glycal epoxides with allylstannanes as nucleophiles [81a], This methodology has been efficiently used in the (3-stereoselective introduction of the side chain (C44-C51) of spongistatin 2 (Scheme 8.43) [81b,c]. [Pg.302]

Perrier RJ (2001) Substitution-with-Allylic-Rearrangement Reactions of Glycal Derivatives. 215 153-175... [Pg.233]

Reaction Products and the Yields" (%, in parentheses) of Glycals with CFjOF,F2, and Xep2... [Pg.172]

When the accessible concentration range of glycal [A] c Kj and kpg- c khydr as for ) -D-galactosidase from E. coli, this reduces to k (1 + [S]/ Kp,) = (kp /K,0 [A] + khydf. The rate constant k yj, for the addition of water has to be measured separately, by the appearance of the 2-deoxy-o-hexose. With )S-D-galactosidase from E. and yS-D-glucosidase from... [Pg.351]

K. Toshima, T. Ishizuka, G. Matsuo, and M. Nakata, Practical glycosidation method of glycals using montmorillonite K-10 as an environmentally acceptable and inexpensive industrial catalyst, Synlett (1995) 306-308. [Pg.90]

K. Toshima, N. Miyamoto, G. Matsuo, M. Nakata, and S. Matsumura, Environmentally compatible C-glycosidation of glycals using montmorillonite K-10, Chem. Commun., 11 (1996) 1379-1380. [Pg.91]

P. Tiwari, G. Agnihotriand, and A. K. Misra, Synthesis of 2, 3-unsaturated C-glycosides by HC104-Si02 catalyzed Ferrier rearrangement of glycals, Carbohydr. Res., 340 (2005) 749-752. [Pg.91]

For the synthesis of glycans containing 2-amino-2-deoxysugars, the regioselective azidophenylselenation of glycals is popular [524—528]. This methodology follows on from the classic azidonitration work of Lemieux and Ratdiffe, first reported in the... [Pg.308]

Scheme 5.43 Preparation of glycals via base-induced eliminations. Scheme 5.43 Preparation of glycals via base-induced eliminations.
Scheme 5.55 Conversion of glycals to phosphorodithioates as glycosyl donors. Scheme 5.55 Conversion of glycals to phosphorodithioates as glycosyl donors.
Scheme 5.60 Use of catalytic NbCI5 in microwave-assisted glycosylations of glycals. Scheme 5.60 Use of catalytic NbCI5 in microwave-assisted glycosylations of glycals.
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See also in sourсe #XX -- [ Pg.332 ]



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Activation of Glycals

Addition of Sulfur Based Electrophiles to Glycals

Allylic rearrangement, of glycals

Application of the Oxo Reaction to Glycals

Coupling of Substituted Glycals with Aryl Groups

Direct Coupling of Glycals with Aryl Groups

Epoxidation of Glycals

Glycal

Glycals of Other Sugars

Glycosidation of Glycals

Halogenation of glycals

Hydroformylation of glycals

Hydroxylation, of glycals

Methoxymercuration, of glycals

Other Reactions of Glycals

Physiological Significance of the Glycals

Preparation of Glycals

Protonation of Glycals

Rearrangement of glycals

Ring Opening of Glycal-Derived 1,2-Cyclopropane

Syntheses of Glycals

The Glycal Assembly Method on Solid Supports Synthesis of Oligosaccharides and Glycoconjugates

The Preparation and Reactions of 3,6-Anhydro-D-Glycals

Use of glycals as direct glycosyl donors haloglycosylation

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