Online Encyclopedia

NON

Online Encyclopedia
Originally appearing in Volume V11, Page 358 of the 1911 Encyclopedia Britannica.
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NON Furoxane. such as furfuracrolein, C4H3O•CH:CH•CHO, and furfuracetone, C4H3O•CH:CH•CO•CH3. With alcoholic potassium cyanide it changes to furoin, C4H3O.CHOH•CO•C4H3O, which can be oxidized to furil, C4H3O•CO•CO•C4H30, whilst alcoholic potash converts it into furfuryl alcohol. With fatty acids and acid anhydrides it gives the " Perkin " reaction (see CINNAMIC ACID). Furfurol is shown to have its aldehydic group in the a position, by conversion into furfurpropionic acid, C4H3O•CH2•CH2•CO2H, which on oxidation by bromine water and subsequent reduction of the oxidized product is converted into n-pimelic acid, HO2C(CH2)5CO2H. Furfurol in minute quantities can be detected by the red colour it forms with a solution of aniline acetate. Furfurane- aa'- dicarboxylic acid or dehydromucic acid, C4H20(CO2H)2, is formed when mucic acid is heated with hydrochloric acid at too° C. On being heated, it loses carbon dioxide and gives pyromucic acid. By digesting acetoacetic ester with sodium succinate and acetic anhydride, methronic acid, C8H805, is obtained; for the constitution of this acid, see L. Knorr, Ber., 1889, 22, p. 152, and R. Fittig, Ann., 1889, 250, p. 166. Di- and tetrahydrofurfurane compounds are also known (see A. Lipp, Ber., 1889, 22, p. 1196; W. H. Perkin, junr. Journ. Chem. Soc., 1890, 57, p. 944; and S. Ruhemann, ibid., 1896, 69, p. 1383).
End of Article: NON
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