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Halogenated pyridines IV. Nuclear chlorinated pyridine-3-carboxylic acids . Chlorinated pyridine-3-carboxylic acids (nicotinic acids) are readily accessible by oxidation of nuclear chlorinated 3-chloromethyl-pyridines. The catalytic oxidation procedures proved to be by far the best ones of the methods tested. 相似文献
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Reaction between P4O10 and H2O2 yields the hitherto unknown Diperoxo monophosphoric acid, H3PO6 (VI). The new compound is also the product of the reaction between P2O3Cl4 or OPCl2(OH) with H2O2. Solvolysis of P2O3F4 with H2O2 leads to the formation of Difluoro peroxo monophosphoric acid, HPO3F2 (XI), which has not been known as yet. Monofluoro peroxo monophosphoric acid, H2PO4F (IV), is formed in the reaction between OPCl2F with H2O2 in good yield. Properties, especially NMR data of the new compounds and other peroxo acids of phosphorus are described. 相似文献
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Furancarboxylic Acids in Cattle Urine The urine of cattle contains large amounts of furancarboxylic acids. The same acids were isolated from rats after feeding with methyl esters of the so-called F-acids. Since the F-acids were not detected in cattle-food, they must be produced somewhere in the body of cattle. 相似文献
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