FIELD: organic synthesis.
SUBSTANCE: invention relates to a method for producing C-H-acid (met)acrylates of the formula CH2=CR1-CO-NH-R2-NH-CO-CH2-CN (I), (P), where R1: H or methyl, R2: CnHm, where n = 2-15 and m = 4-30. The method is characterized by the fact that a) cyanoacetic acid ester (A) is reacted with an excess of diamine (B), which is a compound with the formula H2N-R2-NH2; b) unreacted diamine (B) is removed from the reaction solution; c) intermediate product (IP) obtained at stage b), functionalized by the amino group cyano-acetamide: c1) is introduced into reaction with esters of (met)acrylic acid (MAD) or c2) is introduced into the reaction with (met)acrylic anhydride (MAD) or (met)acryloyl halide (MAD); d) the product (P) obtained at stage c) is not necessarily isolated by extraction or crystallization.
EFFECT: proposed method makes it possible to achieve high values of the degree of conversion, as well as to reduce the number of by-products.
11 cl, 7 ex
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Authors
Dates
2021-12-01—Published
2019-07-10—Filed