Big Chemical Encyclopedia

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

Articles Figures Tables About

Zemplen deacetylation conditions

The methyl ester 107 was obtained by treatment of ammonium KDO with methanol in the presence of an acidic catalyst,79 and it is likely that these esterification conditions (rather than the presence of the ester group of itself) favor the furanoid form. It would be of interest to ascertain whether the methyl ester (111) of KDO, when prepared by Zemplen deacetylation of 70 (see Scheme 31), would also yield furanoid derivatives upon benzoylation with benzoyl chloride in pyridine. [Pg.375]

Zn metal. In addition, unprotected bipyridine-Cu(I) complexes were obtained via O-deacetylation under Zemplen conditions, in contrast to the terpyridine-Zn(II) adduct, where the complex decomposed. [Pg.273]

Boiling the first- and second-generation glycodendrons 396 and 397 in ethanol in the presence of c .v-Ru(bipy)2Cl2 or RuC13 followed by O-deacetylation under Zemplen conditions yielded dendritic complexes 398-400 (Scheme 42) containing 6 or 18 peripheral mannopyranosides, respectively. [Pg.280]

See other pages where Zemplen deacetylation conditions is mentioned: [Pg.82]    [Pg.329]    [Pg.82]    [Pg.329]    [Pg.193]    [Pg.379]    [Pg.101]    [Pg.205]    [Pg.417]    [Pg.134]    [Pg.146]    [Pg.180]    [Pg.186]    [Pg.200]    [Pg.214]    [Pg.248]    [Pg.262]    [Pg.273]    [Pg.295]    [Pg.337]    [Pg.354]    [Pg.22]    [Pg.445]    [Pg.108]    [Pg.111]    [Pg.265]    [Pg.209]   
See also in sourсe #XX -- [ Pg.329 ]



SEARCH



Deacetylated

Zemplen conditions

Zemplen deacetylation

© 2024 chempedia.info