Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Glucopyranosyl bromide preparation

Initially it was necessary to devise an improved method for the preparation of 2-hydroxyglycal esters, because the standard procedure (treatment of an acylglycosyl bromide with diethylamine in benzene or chloroform solution) was inconveniently lengthy in time and frequently afforded only a moderate yield of product (5). As a result of their recent thorough investigation of the kinetic features of the dehydrobromination of tetra-O-acetyl-a-D-glucopyranosyl bromide Lemieux and Lineback... [Pg.158]

Isomerization of organic thiocyanates to isothiocyanates is also discussed in other articles.25 29 The first sugar isothiocyanate reported, namely, 2,3,4,6-tetra-O-acetyl-/3- D-glucopyranosyl isothiocyanate (2) was synthesized by Emil Fischer7 in 1914 by treatment of 2,3,4,6-tetra-O-acetyl-a-D-glucopyranosyl bromide (1) with silver thiocyanate in anhydrous xylene. It was also prepared by Muller and Wilhelms8 by thermal isomerization of the corresponding thiocyanate 3, obtained by treatment of 1 with potassium... [Pg.94]

See other pages where Glucopyranosyl bromide preparation is mentioned: [Pg.477]    [Pg.990]    [Pg.69]    [Pg.95]    [Pg.171]    [Pg.208]    [Pg.226]    [Pg.142]    [Pg.270]    [Pg.103]    [Pg.289]    [Pg.132]    [Pg.142]    [Pg.146]    [Pg.47]    [Pg.253]    [Pg.41]    [Pg.247]    [Pg.237]    [Pg.648]    [Pg.477]    [Pg.115]    [Pg.123]    [Pg.247]    [Pg.66]    [Pg.53]    [Pg.283]    [Pg.301]    [Pg.643]    [Pg.22]    [Pg.26]    [Pg.29]    [Pg.32]    [Pg.57]    [Pg.314]    [Pg.10]    [Pg.97]    [Pg.137]    [Pg.108]    [Pg.229]    [Pg.41]    [Pg.48]    [Pg.55]    [Pg.34]    [Pg.560]    [Pg.643]   
See also in sourсe #XX -- [ Pg.34 , Pg.258 ]



SEARCH



Bromides, preparation

Glucopyranosyl bromide

© 2024 chempedia.info