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Carbohydrate mercaptals

Hydrogen chloride magnesium sulfate Carbohydrate mercaptals... [Pg.166]

Mercaptals are more stable than acetals towards hydrolysis. They can be cleaved by means of HgCl2 in the presence of CaC03 or CdC03 or, better, by means of HgO. This method has become important particularly in carbohydrate chemistry.96... [Pg.402]

Fischer420 reported the preparation of mercaptals from carbohydrates the reaction can be applied to all aldoses and aliphatic thiols, but fails with thio-phenols and also with fructose and sorbose,421 so that it can be used to separate, e.g., glucose from a mixture with fructose and sorbose. [Pg.651]

Carbohydrate derivatives. A soln. of D-mannose diethyl mercaptal in aq. 70%-ethanol treated portionwise with a slurry of Raney-Ni W 2 in ethanol, the composition of the mixture checked 15 min. after each addition, and the products isolated when the startg. m. has disappeared 4.31 g. crude 1-deoxy-1-ethylmercapto-D-mannitol and 0.98 g. 1-deoxy-D-mannitol. F. e. s. B. Lindberg and L. Norden, Acta Ghem. Scand. 15, 958 (1961). [Pg.38]

See other pages where Carbohydrate mercaptals is mentioned: [Pg.419]    [Pg.78]    [Pg.262]    [Pg.324]    [Pg.473]    [Pg.473]    [Pg.232]    [Pg.332]    [Pg.334]    [Pg.343]    [Pg.91]    [Pg.419]    [Pg.78]    [Pg.262]    [Pg.324]    [Pg.473]    [Pg.473]    [Pg.232]    [Pg.332]    [Pg.334]    [Pg.343]    [Pg.91]    [Pg.92]    [Pg.51]    [Pg.327]    [Pg.40]    [Pg.129]    [Pg.613]    [Pg.62]    [Pg.331]    [Pg.273]   
See also in sourсe #XX -- [ Pg.651 ]

See also in sourсe #XX -- [ Pg.21 , Pg.265 ]



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Mercaptals

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