7234-49-3

The possibility of anionic copolymerization of ω-dodecalactam, ε-caprolactam, and ε-caprolactone in the presence of catalytic amounts of sodium caprolactamate and 2,4-toluene diisocyanate as activator was examined.

The invention discloses a method for synthesizing hexanediamine by taking caprolactam as a raw material. The method comprises the following steps that (1) after the hexanediamine, alkali and water aremixed, heating reflux is conducted, and thus 6-amino-caproate is obtained; (2) the 6-amino-hexanoate obtained in the step (1) is introduced into an amino protecting group to protect an amino end group, then acid is added for neutralization to generate aminocaproic acid with the amino protecting group; (3) after a product obtained in the step (2) is dried, a dehydration catalyst for amide is added, a heating reaction is conducted in the presence of an ammonia source to convert a carboxylic acid group into a cyano group, and thus product nitrile is obtained; and (4) after the product nitrile obtained in the step (3) is extracted and purified, catalytic hydrogenation is conducted to generate corresponding amine, then the protecting group is removed, and thus a target product can be obtained.

The invention provides a novel synthesis method of 2,4,6-tri(aminocaproate)-1,3,5-triazine. The novel synthesis method comprises the following steps: taking caprolactam, alkali and water to react, soas to generate a first intermediate; taking the first intermediate and melamine to react to generate a second intermediate; adding sulfuric acid and the second intermediate and stirring materials to obtain particles with a certain size; under the protection of nitrogen gas, centrifuging the materials. The invention provides a novel synthesis route; an organic solvent is used as a reaction system and the water quantity is greatly reduced; a product has certain solubility in water, so that compared with a water system of an existing technology, the loss of the product is less and the yield is higher.

The invention provides a production technology of 2,4,6-tri-(6-aminocaproic acid)-1,3,5-triazine. The production technology includes the following steps of 1, hydrolysis reaction of caprolactam; 2, condensation reaction of the hydrolysate and cyanuric chloride; 3, acidized crystallization; 4, pre-washing and pulping. According to the production technology, in the reaction aspect, the hydrolysis time of caprolactam and the condensation time of the hydrolysate and cyanuric chloride in a traditional production technology are greatly shortened, the dissolution heat generated in the operation process is sufficiently used, the energy consumption of steam is saved, and heating time is also saved; in the post-processing aspect, double-water-tank circulating top washing is adopted, the amount of top washing water and top-washing time are greatly saved, the top washing water and pulping water are shared, and the amount of waste water is reduced by about 60%.

Fluorescent dyes are disclosed which are useful as reporter groups for labeling biomolecules. The silicon phthalocyanine dyes disclosed are preferably water soluble, isomericly pure, possess high quantum yield, and are useful in bioassays.

The hydrolysis rate of the ester bond in the molecules of methyl esters of the N-retinylidene derivatives of aliphatic amino acids depends on their chain lengths.The higher reaction rates for the derivatives of γ-aminobutyric and δ-aminovaleric acids are explained by intramolecular catalysis.

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