| abstract |
Process for the preparation of compounds of formula XV in which the radicals have the following meaning: x NO 2 , S (O) n Ry; Rx, Ry each an inert radical; m 0, 1, 2, 3 or 4; n 2; comprising the reaction of compounds of the formula XVI in which the substituents have the abovementioned meaning, with an organic nitrite of the general formula RO-NO, where R is an aliphatic or aromatic radical, under the action of a base, wherein the reaction at a temperature below -20 ° C in the presence of a followed by dipolar aprotic solvent and optionally subsequent conversion of the oxime group -CH = NOH in formula XV in the corresponding aldehydes -CHO, nitriles (-CN) or nitrile oxides (-CNO). |