A process for obtaining (nitroxymethyl)phenyl esters of...

Details A process for obtaining (nitroxymethyl)phenyl esters of... A process for obtaining (nitroxymethyl)phenyl esters of...

C - Chemistry, Metallurgy

07

C

C07C 203/04 (2006.01) C07C 67/14 (2006.01) C07C 69/90 (2006.01) C07C 201/02 (2006.01)

Patent

CA 2377222

A process for obtaining (nitroxymethyl)phenyl esters of salicylic acid derivatives of formula (I) wherein R1 is the OCOR3 group characterized in that it comprises the following steps: a) reaction of a halide of a salicylic acid derivative with hydroxybenzylalcohol in the presence of a base; b) nitration of the obtained product in anhydrous conditions by a mixture of nitric acid with a different inorganic acid, or an organic acid, or an anhydride of one or two organic acids; c) recovery of the final product.

L'invention concerne un procédé d'obtention d'esters (nitroxyméthyl)phényle à partir de dérivés d'acides salicycliques correspondant à la formule (I), dans laquelle R¿1? représente le groupe OCOR¿3? caractérisé en ce qu'il comprend les étapes suivantes : a) réaction d'un halogénure d'un dérivé d'acide salicyclique avec un hydroxybenzylalcool en présence d'une base, b) nitration du produit obtenu dans des conditions anhydres par mélange d'acide nitrique avec différents acides inorganiques, ou un anhydride d'un ou deux acides organiques, c) récupération du produit final.

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