Thymopentin modified by heterocyclic carboxylic acid, its preparation, antitumor effect and application
A technology of heterocyclic carboxylic acid and thymus, which is applied in the direction of antineoplastic drugs, peptide preparation methods, medical preparations containing active ingredients, etc., and can solve problems such as high toxicity and unsatisfactory curative effect
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Examples
Embodiment 1
[0072] Embodiment 1 prepares Boc-Val-Tyr-OBzl (1)
[0073] Dissolve 0.434g (2.0mmol) Boc-Val in 15mL of anhydrous THF, and add 0.27g (2.0mmol) N-hydroxybenzotriazole (HOBt) and 0.45g (2.2mmol) dicyclohexyl Carbonyldiimide (DCC). After stirring for 5 minutes, a solution of 0.886 g (2.0 mmol) Tos.Tyr-OBzl in anhydrous THF was added. The reaction mixture was adjusted to pH 8-9 with N-methylmorpholine (NMM), and stirred in ice bath for 8 hours. The reaction was stopped, and the precipitated dicyclohexylurea (DCU) was removed by filtration. The filtrate was concentrated under reduced pressure, the residue was dissolved in ethyl acetate, and the resulting solution was successively washed with saturated NaHCO 3 Aqueous solution, saturated 5% KHSO 4 aqueous solution and saturated NaCl aqueous solution. Ethyl acetate layer with anhydrous NaSO 4 Let dry for 2 hours. Filter out NaSO 4 , and the filtrate was concentrated under reduced pressure to remove ethyl acetate. The residue...
Embodiment 2
[0074] Embodiment 2 prepares HCl Val-Tyr-OBzl (2)
[0075] Dissolve 0.874g (1.79mmol) (1) in 10mL hydrogen chloride-ethyl acetate (4mol / L) solution, stir at room temperature for 2 hours, TLC detects that the raw material point disappears, remove ethyl acetate under reduced pressure, and add a small amount of ether repeatedly Vacuum under reduced pressure to remove acid gas from the product. Finally, a small amount of ether was added to grind the product into solid powder, which was directly used in the next reaction.
Embodiment 3
[0076] Example 3 Preparation of Boc-Asp(OBzl)-Val-Tyr-OBzl(3)
[0077] 0.578g (1.79mmol) Boc-Asp (OBzl) was dissolved in 15mL anhydrous THF, and 0.240g (1.78mmol) HOBt and 0.401g (1.95mmol) DCC were added under ice cooling. After stirring for 5 minutes, a solution of 0.758 g (1.79 mmol) HCl·Val-Tyr-OBzl (2) in anhydrous THF was added. The reaction mixture was adjusted to pH 8-9 with NMM, and stirred in an ice bath for 8 hours. The reaction was stopped, and the precipitated DCU was removed by filtration. The filtrate was concentrated under reduced pressure, the residue was dissolved in ethyl acetate, and the resulting solution was successively washed with saturated NaHCO 3 Aqueous solution, 5% KHSO 4 aqueous solution and saturated NaCl aqueous solution. Ethyl acetate layer with anhydrous NaSO 4 Let dry for 2 hours. Filter out NaSO 4 , and the filtrate was concentrated under reduced pressure to remove ethyl acetate. The residue was separated by column chromatography (CH ...
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Description
Claims
Application Information
- IPC
- C07K7/06; C07K1/06; C07K1/02; A61K38/08; A61P35/00
- CPC
- Y02P20/55
- Inventors
- 赵明; 彭师奇