Process for producing mono-P-nitrobenzyl malonate
AssigneeNippon Kayaku Kabushiki Kaisha
InventorKenji Kunikata
Life of this patent
Estimating the term…
Abstract
The present invention aims at providing a process for economically producing mono-p-nitrobenzyl malonate while recovering the excessive malonic acid and treating the by-product. The process of the present invention for producing mono-p-nitrobenzyl malonate comprises reacting p-nitrobenzyl-alcohol with malonic acid in an organic solvent, which may contain di-p-nitrobenzyl malonate if necessary, cooling the reaction mixture thus obtained to 35.degree. to 100.degree. C., separating the malonic acid thus precipitated and treating the reaction mixture with a basic aqueous solution at 35.degree. to 80.degree. C. The di-p-nitrobenzyl malonate formed as the by-product is effectively utilized by hydrolyzing or reacting with malonic acid to thereby give mono-p-nitrobenzyl malonate.
Claims5
A process for producing mono-p-nitrobenzyl malonate which comprises reacting p-nitrobenzyl alcohol with malonic acid in an organic solvent, cooling the reaction mixture thus obtained to 35.degree. to 100.degree. C., separating the malonic acid thus precipitated, treating the reaction mixture with a basic aqueous solution at 35.degree. to 80.degree. C. and then extracting mono-p-nitrobenzyl malonate therefrom.
A process for producing mono-p-nitrobenzyl malonate which comprises reacting p-nitrobenzyl alcohol with malonic acid in an organic solvent containing di-p-nitrobenzyl malonate, cooling the reaction mixture thus obtained to 35.degree. to 100.degree. C., separating the malonic acid thus precipitated, treating the reaction mixture with a basic aqueous solution at 35.degree. to 80.degree. C. and then extracting mono-p-nitrobenzyl malonate therefrom.
Dependencies are inferred from the claim text.