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Galactoside methyl 3,4-0-isopropylidene

Methyl 6-deoxy-2,3-0-isopropylidene-4-0-tosyl-L-mannoside Methyl 0-deoxy-2,3-O-isopropyIidene-5-O-tosyl-L-mannoside Methyl 0-deoxy-2,3-di-O-methyl-4-O-to9yl- -L-mannoside Methyl 4,0-O-benzylidene-2-O-methyl-3-O-tosyl- 8-n-gaIactoside Methyl 0-deoxy-3-O-methyl-2,4-di-0-tosyl- 8-D-galactoside Methyl 0-deoxy-3,4-di-O-methyl-2-O-tosyl-acL-galactoside Methyl 2,0-dideoxy-3-O-methyl-4-O-tosyl-a-D- galactoside ... [Pg.162]

Oxidation of methyl 3,4-isopropylidene-2-desoxy-a-D-galactoside with potassium permanganate in the presence of potassium hydroxide afforded methyl 3,4-isopropylidene-2-desoxy-a-D-galacturonoside (LXXXIV) as its potassium salt. This could readily be converted into methyl 2-desoxy-a-D-galacturonoside (LXXXV) and both LXXXIV and LXXXV afforded crystalline esters and amides.230 The uronic acid derivative could be reduced by lithium aluminum hydride in ethereal solution to give methyl 3,4-isopropylidene-2-desoxy-a-D-galactoside.230 Although 2-des-... [Pg.100]

Hot absolute methanol containing p-toluenesulfonic acid effected226 de-acetonation of methyl 3,4-0-isopropylidene-2,6-di-0-tosyl-a-D-galactoside. [Pg.147]

Like sodium hydroxide and sodium methoxide, sodium methyl mercaptide merely detosylates an isolated secondary sulfonyloxy group, as in methyl 6-deoxy-3,4-0-isopropylidene-2-0-tosyl-a-D-galactoside226 and methyl 4,6-O-benzylidene-3-0-methyl-2-0-tosyl-a-D-galactoside.162... [Pg.179]

In the field of natural red algal galactans, MS was used for the first time in the structural analysis of odonthalan.353 Galactose and 6-O-methylgalactose, the hydrolysis products of the polysaccharide, were separated by column chromatography and identified by MS in the form of their di-O-isopropylidene derivatives. Cyclic derivatives of this type had been shown previously to be especially suitable for mass-spectrometric characterization of the structure and (in certain instances) stereochemistry of monosaccharides.349,354 A combination of GLC and MS was also used for identification of methyl 4.6-O-0 -methoxycarbonylethylidene)-D-galactosides (as their trifluoroacetates) in the methanolysis products of Ji-carrageenan from Petrocelis middendorfii,355... [Pg.147]

Deoxy-D-galactose 6-phosphate was prepared by phosphorylation of 3,4-isopropylidene a-methyl-2-deoxy-D-galactoside . ... [Pg.137]

See other pages where Galactoside methyl 3,4-0-isopropylidene is mentioned: [Pg.181]    [Pg.103]    [Pg.136]    [Pg.161]    [Pg.167]    [Pg.176]    [Pg.101]    [Pg.138]    [Pg.120]    [Pg.121]    [Pg.126]    [Pg.4]    [Pg.50]    [Pg.85]    [Pg.391]    [Pg.54]    [Pg.22]    [Pg.37]   
See also in sourсe #XX -- [ Pg.3 , Pg.121 ]



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Galactoside

Galactoside methyl

Galactosides

Methyl 3,4-0-isopropylidene

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