| 摘要 |
PURPOSE:To produce an acyllactamcarboxylic acid which is an anionic polymerization accelerator for lactams in high purity and yield, by facilitating the reaction of a metal salt of a lactam with a cyclic acid anhydride. CONSTITUTION:A lactam is subjected to a hydrogen-metal exchange reaction with an organic and/or inorganic metallic compound reactive with the lactam to give a metallic salt of the lactam expressed by formula I (M is metallic element selected from Groups I , II and III; Y is H, alkyl, alkoxyl, halogen or lactam; m is an integer 0-2; n is an integer 3-13), e.g. caprolactam magnesium bromide. The resultant compound expressed by formula I is then reacted with a cyclic acid anhydride, e.g. succinic anhydride, to afford the aimed compound expressed by formula II (R is hydrocarbon residue), e.g. N-succinoylcaprolactam. EFFECT:The reactivity is improved by using the metallic salt of the lactam, and the purification is easily carried out.
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