Method for preparing N-carbamyl glutamic acid

A technology of carbamoylglutamic acid and glutamic acid, applied in the field of N-carbamylglutamic acid preparation, can solve problems such as insufficient synthesis amount, achieve the effects of no toxic side effects, reduce production costs, and simple process

Inactive Publication Date: 2008-04-30
印遇龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some data show that carbamoyl phosphate is necessary for the synthesis of citrulline from ornithine, and N-acetylglutamic acid is a metabolic allosteric activator of carbamoyl phosphate synthase and P5C synthase (Susumu K., et al. in vitro Effects of adding disulfide or thiol compounds on the activity of arginine activator N-acetylglutamate synthase. Molecular Catalysts B: Enzymes. 2000, 10: 191-197), but ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0018] 1mol glutamic acid (glutamic acid), 1mol potassium cyanate (potassium cyanate), and 1mol potassium hydroxide (potassium hydroxide) were thoroughly mixed to obtain a mixture, the mixture was dissolved in 1L distilled water, at room temperature (20-25 ℃) ) for 16-20 hours to obtain a mixture solution, which was acidified with 80ml of concentrated hydrochloric acid, and then left to stand for 2-3 hours in 200ml of hydantoic acid, filtered, and recrystallized from water to separate out N-carbamide Acylglutamic acid.

Embodiment approach 2

[0020] 1.5mol glutamic acid (glutamic acid), 1.5mol potassium cyanate (potassium cyanate), and 1.5mol potassium hydroxide (potassium hydroxide) were thoroughly mixed to obtain a mixture, the mixture was dissolved in 1L distilled water, at room temperature (20 -25°C) for 16-20 hours to obtain a mixture solution, which was acidified with 100 ml of concentrated hydrochloric acid, and then placed in 200 ml of hydantoic acid for 2-3 hours, filtered, and recrystallized from water to precipitate N - carbamoylglutamic acid.

Embodiment approach 3

[0022] 1.2mol glutamic acid (glutamic acid), 1.2mol potassium cyanate (potassium cyanate), and 1.2mol potassium hydroxide (potassium hydroxide) were thoroughly mixed to obtain a mixture, the mixture was dissolved in 1L distilled water, at room temperature (20 -25°C) for 16-20 hours to obtain a mixture solution, which was acidified with 90ml of concentrated hydrochloric acid, and then placed in 200ml of hydantoic acid for 2-3 hours, filtered, and recrystallized from water to precipitate N-carbamylglutamic acid.

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Abstract

The invention discloses a method for preparing N-carbamoylglutamic acid. The method comprises the following steps: a. Mixing glutamic acid, potassium cyanate, potassium hydroxide, concentrated hydrochloric acid and urea propionic acid according to 1-1.5: The molar ratio of 1-1.5:1-1.5 is fully mixed to obtain the mixture; b. The mixture obtained in step a is dissolved in 1L of distilled water per 1-1.5mol, and placed at room temperature at 20-25°C for 16-20 hours to obtain Contain the liquid of the mixture described in step a of 1-1.5mol in every unit of liquid; c. acidify each unit of liquid described in step b with 80-100ml of concentrated hydrochloric acid, then stand in 200ml of ureapropionic acid for 2-3 hours After filtering, N-carbamylglutamic acid was recrystallized from water. Compared with other existing methods for producing N-carbamylglutamic acid, the present invention has the following advantages: 1. The method uses cheap glutamic acid as a raw material, which greatly reduces the production cost. 2. The production process is carried out at room temperature, and the process is simple. 3. N-carbamoylglutamic acid recrystallized from water has no toxic and side effects. The invention provides a practical way for really realizing the use of N-carbamyl glutamic acid as arginine substitute.

Description

technical field [0001] The present invention relates to a preparation method of N-carbamylglutamic acid. Background technique [0002] Arginine is an essential amino acid for suckling piglets. The amount of arginine in breast milk and the endogenous synthesis in the intestine of suckling piglets cannot meet their optimal growth needs. Insufficient arginine limits the optimal growth of suckling piglets. a major factor. Piglets have a high demand for arginine, and the arginine content in breast milk is 1.34g / L, which can meet about 40% of the piglets' requirements. The concentration of arginine and its synthetic precursors in the plasma of piglets decreased from 3 to 14 days after birth. One of the reasons was that the concentration of amino acids and proteins in breast milk decreased due to the prolonged lactation period due to the increase of protein deposition required for the growth of pigs. The production of suckling piglets is very important to the whole pig production...

Claims

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Application Information

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IPC IPC(8): C07C275/16C07C273/18
Inventor 印遇龙黄瑞林唐志茹
Owner 印遇龙
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