Novel hapten for tebuconazole as well as synthetic method and application thereof
A synthetic method and hapten technology applied in the field of hapten to achieve the effect of simple synthetic method, high sensitivity and strong specificity
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[0049] (2) Preparation of immunogen
[0050] Weigh tebuconazole hapten (4.1 mg, 0.01 mmoL) and add it to NN-dimethylformamide (DMF, 1 mL), stir to dissolve, add 1-ethyl-carbodiimide hydrochloride ( EDC, 4.5 mg) and N-hydroxysuccinimide (NHS, 4.4 mg) were reacted at room temperature for 6 hours to obtain liquid A.
[0051] Take hemocyanin (KLH, 20.92 mg / mL, 0.3 mL) and add it to the borate buffer solution (0.2 mol / L, 3.5 mL, pH 8.8), stir and mix well to obtain liquid B. Under an ice bath, add liquid A to liquid B dropwise, stir and react at 4°C for 8-10 hours.
[0052] The reaction solution was dialyzed with phosphate buffer solution (0.01mol / L, pH 7.2) for 3 days, and the dialysate was changed every 6 hours, 8 times. The obtained tebuconazole immunogen is aliquoted, stored frozen and reserved.
[0053] (3) Preparation of the original coating
[0054] Weigh tebuconazole hapten (4.1 mg, 0.01 mmol) and dissolve in NN-dimethylformamide (DMF, 1 mL), then add tributylamine (8 μL) and isob...
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[0066] Example 1 Synthesis and identification of tebuconazole hapten
[0067] Step 1: Synthesis of intermediate products
[0068] First dissolve tebuconazole (184 mg, 0.6 mmol) in dry dichloromethane (CH 2 Cl 2 , 15 mL), then add triethylamine (C 6 H 15 N, 730 mg, 7.2 mmol). After stirring on an ice bath for 5 minutes, add monoethyl succinate monochloride (C 6 H 9 ClO 3 , 988 mg, 6 mmol), stirred overnight at room temperature, washed with water and saturated brine (15 mL×3 respectively), dried dichloromethane with anhydrous sodium sulfate, filtered, evaporated under reduced pressure and concentrated to dryness to obtain The intermediate product (about 400mg) was directly used in the next step of hydrolysis. The structure of the product was characterized by liquid-mass spectrometry.
[0069] Step 2: Synthesis of Tebuconazole Hapten
[0070] The intermediate product (400 mg, 0.6 mmol) was dissolved in anhydrous methanol-tetrahydrofuran (9 mL: 9 mL) mixture, and an aqueous solution of l...
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[0073] Example 2 Preparation and identification of tebuconazole antigen
[0074] 1. The tebuconazole hapten is coupled with hemocyanin (KLH) by the active ester method (EDC method) and used as an immunogen. The specific reaction route is as follows:
[0075]
[0076] The tebuconazole hapten is conjugated with chicken ovalbumin (OVA) or bovine serum albumin (BSA) by the mixed acid anhydride method and used as the coating agent. The specific reaction route is as follows:
[0077]
[0078] Description: Among them, Protein is a protein.
[0079] 2. Purification of artificial antigen
[0080] The artificial antigen was desalted and purified by dialysis.
[0081] 3. Identification of artificial antigens
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