Meso-Erythritol

The electrochemical oxidation of polyhydric alcohols, viz. ethylene glycol, glycerol, meso-erythritol, xilitol, on a platinum electrode show high reactivity in alkaline solutions of KOH and K2C03 [53]. This electro-oxidation shows structural effects, Pt(lll) being the most active orientation. This results from different adsorption interactions of glycerol with the crystal planes [59]. 

Several compounds have been proposed for the measurement of the void volume, including sodium nitrate solution, water, deuterium oxide, fructose, acetonitrile, tetrahydrofuran (THF), meso-erythritol, gluconolactone, and 2,4-dinitronaphthol. The elution volume of a number of these compounds has been measured in 10-90% aqueous acetonitrile and acidic-aqueous acetonitrile. The results are given in Figure 3.9 where the volumes in A and B were measured in aqueous acetonitrile and in C and D were measured in aqueous acetonitrile containing 50 mM phosphoric acid. Methanol (a) and deuterium oxide (g) showed two peaks when monitored by a refractive index detector (Figure 3.9C). 

EosinYTS, 851 l 8-Epoxy-p-menthane, 496 Epsom Salt, 237 Equisetic Acid, 15 Ergocalciferol, 432 Eriochrome Black T, 860 Eriochrome Black TS, 851 Erythorbic Acid, 134 Erythritol, (S2)10 meso-Erythritol, (S2)10 Erythrosine, 143, (S3)26 Essential Oils, Infrared Spectra of, 572, (S3)93... 

R,3S)-Butane 1,2,3,4-tetrol C Eridex E968 erythrite erythroglucin meso-erythritol phycite tetrahydroxybutane. 

Alditols and Amino-alditols. - A preparation of the tetritol (Cs-Ce) fragment, 1, of the macrolactone (+)-aspicilin, featured the desymmetrization of meso-erythritol through the formation and subsequent base-promoted dia-stereoselective acetal fission of a C2-symmetric his-sulfoxide intemediate, (Scheme 1,2- 3). ... 

Figures. The C NMR spectrum of the oligomers of succinic anhydride and meso-erythritol (3 1 mole ratio) formed after 7 hours in r vxing diaxane. Structures in Scheme IV are similar to these.

Mesityl phenyl ketone Mesityl (phenyl) methanone. See 2,4,6-Trimethylbenzophenone Mesobenzanthrone. See Benzanthrone, meso-2,3-Dimethyl-2,3-butanediol. See Pinacol meso-Erythritol. See Erythritol meso-lnositol. See Inositol meso-lnositol hexanicotinate. See,Inositol hexanicotinate... 

It has also been shown that lipase CA can produce reduced sugar-containing polyesters regioselectively from divinyl sebacate and sorbitol, in which sorbitol was exclusively acylated at the 1 and 6-positions (Scheme 23.11) [115]. Mannitol and meso-erythritol were also regioselectively polymerized with divinyl sebacate. The lipase CA-catalyzed polycondensation of adipic acid and sorbitol also took place in... 

Subcritical fluid chromatography (SubFC) analysis of nine monosaccharides and three polyols, meso-erythritol, xylitol, and mannitol, on silica phases has been developed. Mobile phase composition was CO2 modifier (80 20, v/v), the modifier being MeOH-water-triethylamine (91.5 8.0 0.5, v/v/v). In SubFC, the addition of triethylamine slightly increase the retention since interactions with the solutes and/or a strong interaction with the silanols and the residual silanols can occur. 

The J-ECHO c-n.m.r. spectra of the acetylated and methylated beta-CD-crown ethers were obtained with a Bruker WP 200 SY instrument (Figs 5 and 6) with the J-ECHO pulse sequence the carbons bearing two protons appear with reverse phase as compared to the mono- and tri-protonated ones. Consequently, C-1, C-4 and C-5 give peaks of positive intensity whereas the signals of C-2, C-3 and C-6 are of negative intensity. The J-ECHO spectra of the acetylated and methylated beta-CD-crown ethers showed a complete symmetry of these molecules being optically inactive due to the symmetric substitution pattern of the meso-erythritol units. 

A significantly better separation between the two disaccharides is obtained with a more complex NaOH gradient. Instead of zinc acetate, small amounts of sodium acetate are added to the mobile phase in order to elute more strongly-retained saccharides within an acceptable time frame. Figure 3-177 shows a respective chromatogram with carbohydrates, which are relevant for the analysis of luine to assess kidney functionality. In addition to lactose and lactulose, these carbohydrates include meso-erythritol, mannitol, sucrose, and turanose. Under these chromatographic conditions, resolution between lactose and lactulose is so large that even an excess of lactose does not prohibit clear quantitation of lactulose. 

---