| abstract |
Procedure for preparing nitroaryloxy-alkane-carboxylic acid derivatives of formula **(See formula)** where X is hydrogen, chlorine or nitro, Y is chlorine or nitro, provided that in each case one of the symbols X and Y represents nitro, R is hydrogen or methyl, R1 is hydrogen, an organic radical, a metal cation or a cation of the formula **(See formula)** wherein R2, R3, R4 and R5 are the same or different, and represent hydrogen, alkyl, cycloalkyl, aralkyl or aryl or two, **(See formula)** respectively three of the radicals R2 to R5, together with the nitrogen atom, can form a heterocyclic ring, and n represents an integer from 1 to 3, the magnitude of the number being dependent on the valence of the radical R1; characterized in that a nitrophenol of formula **(See formula)** in which X and Y have the meanings indicated above, are reacted with an α-halogen-alkanecarboxylic acid derivative of the formula **(See formula)** in which R and n have the meanings indicated above, R6 represents hydrogen, an organic radical or a cation and Hal is chlorine or bromine, possibly in the presence of a diluent and in the presence of an acid binding agent, at temperatures between 0 and 150ºC . (Machine-translation by Google Translate, not legally binding) |