48172-10-7Relevant articles and documents
Synthesis method of amikacin intermediate
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Paragraph 0022; 0023, (2019/10/01)
The invention belongs to the field of medicine synthesis, and particularly relates to a synthesis method of an amikacin intermediate. Phthaloyl chloride and 2-hydroxy-4-aminobutyric acid serve as theinitial raw materials, an acid-binding agent and a catalyst are added, the process of heating, washing, recrystallizing and the like is adopted, and finally the target amikacin intermediate product (2-hydroxy-4-phthaloyl iminobutyric acid) is obtained. In the synthesis method, the raw materials are easy to obtain, less reagents participate in the reaction, the steps are simple, operation is convenient, reaction conditions are mind, the product yield is high, and the method is suitable for industrial large-scale production.
A method for improving the yield of the method of preparing the amikacin
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Paragraph 0004; 0005; 0053; 0054, (2017/07/14)
The invention discloses a method for increasing yield of amikacin. The method for increasing yield of amikacin comprises the following steps: heating, refluxing and carrying out reaction on gamma-amino-alpha-hydroxybutyric acid and fluorenylmethyl chloroformate, so as to generate a reaction liquid containing gamma-amino-alpha-hydroxybutyric acid; directly adding N-hydroxyl phthalimide and N,N-dicyclohexylcarbodiimide into the reaction liquid, and carrying out reaction to generate a reaction liquid containing active ester; directly adding a kanamycin A silanization compound into the reaction liquid containing the active ester for carrying out acylation reaction, after complete reaction is finished, adding an HBr aqueous solution until the pH is adjusted to be 2-3, and carrying out suction filtration to remove solid impurities; and then carrying out reduced pressure distillation for removing the solvent, adjusting the pH to be 7-8 with concentrated liquor, purifying by virtue of a CD180 macroporous resin column, concentrating, and carrying out freeze drying, so that amikacin solid is obtained. The active ester causes selectivity of the acylation reaction to be greatly improved due to enlargement of a protective group, and a follow-up processing step is also greatly simplified, so that the amikacin synthesis yield is increased.
DNA sequence selectivity of hairpin polyamide turn units
Farkas, Michelle E.,Li, Benjamin C.,Dose, Christian,Dervan, Peter B.
supporting information; experimental part, p. 3919 - 3923 (2010/03/02)
A class of hairpin polyamides linked by 3,4-diaminobutyric acid, resulting in a β-amine residue at the turn unit, showed improved binding affinities relative to their α-amino-γ-turn analogs for particular sequences. We incorporated β-amino-γ-turns in six-