Methyl glucosides preparation

Bollenback, Methyl Glucoside, Preparation, Physical Constants, Derivatives , Academic Press, NY (1958) 4) Merck (1968), 687-L... 

Add 10.5 mL of agarose (kept in the 50-56°C water bath) to 200 mg of a-methyl-D-glucoside prepared in another tube heated in the water bath. Then add the antiserum and carefully mix the tube contents see Notes 4 and 6). 

That both of the glucoses and also both of the methyl glucosides have been prepared and their relationship to each other established supports the theory of the lactone constitution. 

Polyether polyols are prepared commercially by the base-catalyzed addition of alkylene oxides such as propylene, ethylene, and butylene oxide to di- or polyfunctional alcohols. Since, for most applications, it is desirable to have hydrophobic urethane compositions, propylene oxide is usually used alone or in combination with small amounts (generally less than 10%) of ethylene oxide. The alcohols used in the manufacture of polyethers include glycols (e.g., propylene glycol) for diols, glycerol, trimethylolpropane, and 1,2,6-hexanetri o 1 for triols, pentaerythritol and a-methyl glucoside for tetrols, sorbitol for hexitols, and sucrose for octols. The base-catalyzed addition of... 

Fischer is best known for his work in carbohydrate chemistry, but he was also active in the fields of photosynthesis and protein and heterocyclic chemistry. He demonstrated that amino acids were the basic building blocks in proteins. His ingenious contribution of the lock and key hypothesis of how enzymes selectively bind substrates of complementary shapes evolved from his work with the proteins known as glucosidases. For example, he found that a-D-methyl glucoside was easily hydrolyzed by a yeast extract termed invertin but not by a preparation... 

Acosamine was prepared from 2-hydroxypropanal 263 in 12 steps in 12% yield. The key conversion of the enantiomerically pure vinyl epoxide to the 2-oxazohdone proceeded with complete retention of configuration. It was conveniently isolated as its A-acetyl-O-methyl glucoside in excellent agreement with the hterature. 

Methyl / -D- Z co-(5-formyl-pentopyranoside) has been prepared in amorphous condition by chromic acid oxidation of the methyl glucoside (4). This compound can be considered as the 1-methyl glucoside of D-gluco-hexodialdose. 

Fatty acid polyesters have been prepared by the weU established method of transesterification in the presence of sodium metal from the peracetates of D-glucitol and trehalose, of methyl glucoside, methyl galactoside, octyl glucoside, and stachyose, and of sucrose. The process for formation and purification of sucrose polyesters has been optimised to furnish pure products in >99% yield. ... 

Synthesis was accomplished of the s-triazine derivatives from uronic and polyuronic acids.5(R)-(2-Amino-4-di-methylamino-l,3,5-triazin-6-yl)-L-arabinopyranose and its methyl glucoside were prepared from gaiact-uronic acid. 5(R)-(2-amino-4-dimethylamino-l,3,5-triazin-6-yl)-p-d-xylo-pyranose was prepared from glucuronolactone. Methyl 5(R)-(2-Amino-4-di-methyl-amino-1,3,5-triazin-6-yl)-a-D-lyxopyranoside was prepared from mannuronolactone by ring closure with N,N-disubstituted biguanide. s-Triazine derivatives of polyuronic acids, such as pectin and alginic acid, were prepared similarly. 

It was first artificially prepared by Tiemann from the glucoside coni-ferin, which occurs in the cambium of various coniferous woods. The constitution of vanUlin is that of methyl protocatechuic aldehyde—... 

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