Process for producing diesterdiamides

Details Process for producing diesterdiamides Process for producing diesterdiamides

1982-06-07

1986-09-30

Trousof, Natalie

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

528292, 560 37, 560169, 560171, 560196, C07C 6700

Patent

active

046148159

ABSTRACT:
Process for preparing diesterdiamides, consisting of reacting a diester with a diamine under wet conditions in the presence of suitable solvents and catalysts, to give the diester diamide, together with an ester salt derivative as impurity. The reaction product is then filtered to give a diesterdiamide cake and a mother solution of the reagents which also contains the solvent, the catalyst and the ester salt product. The cake is washed with a solvent of the ester salt, which also dissolves the reagents and catalysts. The mother solution and wash solution are then distilled, the two fractions obtained being recycled to the synthesis and to the wash.

REFERENCES:
patent: 2839508 (1958-06-01), Williams et al.
patent: 2848439 (1958-08-01), Reynolds et al.
patent: 2851443 (1958-09-01), Williams et al.
patent: 2856385 (1958-10-01), Van Den Berghe et al.
patent: 2861055 (1958-11-01), Williams et al.
patent: 2925405 (1960-02-01), Loakso et al.

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