Calcium glycerate

Calcium 3-O-phosphono-D-glycerate, trihydrate (calcium D-phosphoglycerate, trihydrate)... 

Calcium di-DL-glycerate, dihydrate Disodium DL-glycerol 3-phosphate, hexahydrate 1,4-Anhydroerythritol-sodium perchlorate Bis( 1,4-anhydroerythritol) - sodium iodide Erythritol... 

A mixture of 50 g. (0.3 mole) of dZ-glyceric aldehyde acetal (p. 52) and 500 cc. of 0.1 N sulfuric acid is allowed to stand for one week at about 20 0 (Note 1). The mixture is then treated with 30 cc. of glacial acetic acid and neutralized carefully with barium hydroxide solution (Note 2). The mixture is stirred with 5 g. of decolorizing carbon and filtered. The filtrate is evaporated at 10 mm. pressure (Note 3). When no more water can be removed, the residue is treated with an equal volume of absolute alcohol to hasten crystallization. The crystals are collected on a filter and dried in a vacuum desiccator over soda-lime and calcium chloride. The yield of product melting at 137-1390 is 22 g. (80 per cent of the theoretical amount) (Note 4). 

Preparation 473.—Lead and Calcium Salts of Glyceric Acid. 

Ca Salt.—A dilute aqueous solution of glyceric acid is boiled with excess of calcium carbonate and filtered hot. The filtrate, on concentrating and cooling, yields colourless crystals of the required salt, which may be recrystallised from hot water. (A., 120, 226.)... 

A tridentate complex, at 0-1,0-2, and 0-3, is found in the crystal structure of calcium lactobionate" and D-arabinonate, but not in those of potassium D-gluconate or calcium DL-glycerate." It has been postulated that, in solution, DL-glycerate, D-gluconate, i>glucarate, and lactobionate all form tridentate complexes with lanthanide ions," but the evidence is not conclusive. Unusual tridentate complexation was found at O-1,0-3, and... 

Butlerov found out that in alkaline medium (calcium hydroxide), formaldehyde HCHO polymerizes to form about 20 different sugars as racemic mixtures, Butlerov 1861. The reaction requires a divalent metal ion. Breslow found a detailed mechanism of reaction that explains the reaction products, (Breslow 1959). He found that glycol-aldehyde is the first product that is subsequently converted into glyceral-dehyde (a triose), di-hydroxy-acetone, and then into various other sugars, tetrose, pentose, and hexose. The formose reaction advances in an autocatalytic way in which the reaction product is itself the catalyst for that reaction with a long induction period. The intermediary steps proceed via aldol and retro-aldol condensations and, in addition, keto-enol tautomerizations. It remains unexplained how the phosphorylation of 3-glyceraldehyde leads to glycral-3-phosphate (Fig. 3.6). Future work should study whether or not ribozymes exist that can carry out this reaction in a stereo-specific way. 

Calcium carbonate in suspension in glycerol and hydrogen peroxide causes a considerable structural alteration, with the appearance of formaldehyde, formic acid, glyceric acid, and hydroxymalonic acid. Under identical conditions, D-glucose gives formaldehyde, formic acid, acetic acid, oxalic acid, D-glucaric acid, and other, unidentified, hydroxy acids. ... 

CaHoCaOTP-SHaO Calcium n-phosphoglyoerate, trihydrate caldtun 3-O-phosphono-n-glycerate, trihydrate... 

Acid Derivatives. — Calcium di-DL-glycerate, manganese(ll) D-gluconate, sodium a-D-r/zreo-hex-2,5-ulosonate hydrate, and ethyl 3,7-anhydro-6,8-0-benzylidene-4-deoxy-2-ethylenedithio-D-to/o-2-octulosonate. ... 

Calcium oxalate kidney stones L-glyceric aciduria... 

Acid Derivatives.—Calcium DL-glycerate, potassium D-glucarate, calcium L-ascorbate (comparison of two analyses), 2,3 4,6-di-0-isopropylidene-L-... 

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