Antibacterial peptoid and vesicle and preparation method and application thereof
A technology of antimicrobial peptides and vesicles, which is applied in the field of antimicrobial peptides and vesicles and their preparation, which can solve the problems of restricting the large-scale application of antimicrobial peptides, difficult mass production, complex process flow, etc., and achieve low cost and low environmental pollution , The effect of simple preparation steps
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[0074]
[0075] The preparation method of class antibacterial peptide comprises the steps:
[0076] (1), ε-Z-lysine sodium with amino protecting group reacts with diisocyanate or diisocyanate derivatives in DMSO solvent and at room temperature, the amino group of ε-Z-lysine sodium reacts with diisocyanate or the isocyanate group (NCO) of the diisocyanate derivative is covalently connected, the resulting reaction solution is precipitated in an acidic environment, and the precipitate is taken to obtain a dicarboxylic acid monomer;
[0077] (2), dicarboxylic acid monomers and diisocyanates or diisocyanate derivatives undergo condensation reactions in DMSO solvents to obtain peptide-like copolymers; in this type of polypeptide copolymers, the carboxyl groups of dicarboxylic acid monomers and diisocyanate or Amino groups (derived from isocyanate groups) of diisocyanate derivatives are covalently linked, and diisocyanates or diisocyanate derivatives form diisocyanate units;
[00...
Embodiment 1
[0112] The preparation method of the antimicrobial peptides of the present embodiment comprises the following steps:
[0113] (1), attach benzyloxycarbonyl (as an amino protecting group) to ε‐Z‐lysine to obtain ε‐Z‐lysine with benzyloxycarbonyl;
[0114] (2), 20.000g (71.4mmol) of ε‐Z‐lysine with benzyloxycarbonyl and 2.857g (71.4mmol) of NaOH were neutralized in water at room temperature, stirred for 2 hours, and waited for complete reaction Finally, remove the water in the solution with rotary evaporation to obtain ε-Z-lysine sodium with benzyloxycarbonyl;
[0115] (3), 10g (313.4mmol) ε-Z-lysine sodium with benzyloxycarbonyl (i.e. amino protecting group) and 2.633g (156.7mmol) hexamethylene diisocyanate in 100mL of DMSO solvent React at room temperature for 4 hours. After the reaction is over, the reaction solution is obtained. Pour the reaction solution into 1L of water, slowly add 1mol / L hydrochloric acid solution dropwise while stirring, stop the dropwise addition of hy...
Embodiment 2
[0142] The preparation method of the antimicrobial peptides of the present embodiment comprises the following steps:
[0143] (1), attach benzyloxycarbonyl (as an amino protecting group) to ε‐Z‐lysine to obtain ε‐Z‐lysine with benzyloxycarbonyl;
[0144] (2), 20.000g (71.4mmol) of ε‐Z‐lysine with benzyloxycarbonyl and 2.857g (71.4mmol) of NaOH were neutralized in water at room temperature, stirred for 2 hours, and waited for complete reaction Finally, remove the water in the solution with rotary evaporation to obtain ε-Z-lysine sodium with benzyloxycarbonyl;
[0145] (3), 10g of ε‐Z‐lysine sodium with benzyloxycarbonyl (i.e. amino protecting group) and 2.508g of p-phenylene diisocyanate were reacted at room temperature in 100mL of DMSO solvent for 4h, and the reaction solution was obtained after the reaction , pour the reaction solution into 1L water, slowly add 1mol / L hydrochloric acid solution dropwise while stirring, stop adding hydrochloric acid solution dropwise until th...
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