Barium glyoxylate

Di-(/)-chlorophenyl)-acetic acid has been made by the action of alcoholic potassium hydroxide on l,l-di-(/>-chlorophenyl)-2,2-dichloroethane by the action of barium hydroxide on DDT in ethylene glycol and by the condensation of chlorobenzene with glyoxylic acid. ... 

A further degradation of methyl a-n-glucoside by the action of barium hypobromite was observed by Bergmann and Wolff. From 12 g. of the glycoside, 4.6 g. of glyoxylic acid benzylphenylhydrazone was obtained. The experimental conditions differed from those used in the preparation of menthol a-D-glucuronide in that about twice as much bromine was used. 

Sucrose was oxidized by Fleury and Courtois, who obtained a tetra-aldehyde (87) which was oxidized by bromine, in the presence of strontium or barium carbonate, to the corresponding tetracarboxylic acid salt the latter compound was hydrolyzed with acid to yield D-glyceronic acid, glyoxylic acid, and hydroxypyruvic acid, which spontaneously decomposed into carbon dioxide and glycolaldehyde. It was found that oxysucrose shows four aldehyde groups from hypoiodite estimation, but only two from mercurimetry the latter result was attributed to steric hindrance, but it would seem more likely that, under the conditions of the determination. 

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