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                            The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
 
                
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| CAS No. : | 22888-59-1 | 
| Formula : | C7H17ClN4O2 | 
| M.W : | 224.69 | 
| SMILES Code : | O=C(OC)[C@@H](N)CCCNC(N)=N.[H]Cl | 
| MDL No. : | MFCD00050544 | 
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

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| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| With pyridine; 1-hydroxy-pyrrolidine-2,5-dione; dicyclohexyl-carbodiimide; In methanol; for 48h; | To 2.5 gm (1.5 mmoles) of DS quillaja saponins (I) dissolved in 25 mL of pyridine, was added 4.5 mmoles (0.93 g) of dicyclohexylcarbodiimide (DCC) and 4.5 mmoles (0.52 g) of N-hydroxysuccinimide (NHS), each dissolved in 12.5 mL of pyridine each. To the reaction mixture 0.8 g of <strong>[22888-59-1]L-arginine methyl ester dihydrochloride</strong> (IV) (3.0 mmol) dissolved in methanol (10 mL) was added drop wise with stirring over a period of 2 hours. The reaction was then allowed to proceed with stirring for 2 days. Glacial acetic acid (0.2 mL) was added to the reaction, and the mixture was stirred overnight at room temperature. The resulting suspension was added to distilled water (250 mL) and stirred overnight. Precipitated material (mostly N,N'-dicyclohexyl urea) was removed by filtration. The clear filtrate was evaporated on a rotary evaporator to remove the pyridine. The resulting syrup containing the derivatized saponin was diluted with water put in dialysis bags (M.W. cutoff 3,000) and dialyzed against several changes of 40 mmolar acetic acid for 3 days. Continue dialysis against several changes of water, filter the dialyzed solution, and lyophilize to obtain the dry arginine methyl ester-saponin (V). | 
 [ 907190-93-6 ]
                                                    
                                                    [ 907190-93-6 ]
 [ 22888-59-1 ]
                                                    
                                                    [ 22888-59-1 ]
| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| The mixture of N-[3-(3,5-dichlorophenyl)-l-(2-naphthyl)-lH-pyrazol-5-yl]-beta-alanine (42.5mg, O.lOmmol), methyl L-argininate dihydrochloride, (52.2mg, 0.2mmol), l-(3-Dimethylaminopropyl)-3- EPO <DP n="44"/>ethylcarbodiimide hydrochloride (38.3mg, 0.2mmol), 4-Dimethylaminopyridine (73.3mg, O.mmol) in 2ml N,N-dimethylformamide was stirred at 4O0C for 12 hour. The reaction mixture was quenched with H2O (2OmL), then extracted with EtOAc (3 x 2OmL) and the combined organic extracts washed with brine. The organic phase was dried over Na2SO4 and concentrated in vacuo. The crude was purified by reverse phase HPLC to give Methyl N-[3-(3,5-dichlorophenyl)-l-(2-naphthyl)-l H-pyrazol-5-yl]-beta- alanyl-L-argininate as product. 1H NuMR (MD3OD), 500 MHz) delta 8.082-8.079 (d, IH), 8.04-8.02 (d, IH), 7.97-7.93 (m, 2H), 7.797-7.794 (m, 2H), 7.73-7.70 (m, IH), 7.57-7.54 (m, 2H), 7.386-7.379 (t, IH), 4.42- 4.40 (m, IH), 3.60 (s, 3H), 3.51-3.49 (t, 2H), 3.11-3.10 (br, 2H), 2.63-2.58 (m, 2H), 1.86-1.84 (m, IH), 1.68-1.65 (m, IH), 1.60-1.55 (m,, 2H). MS (ESI) 596.36 (M+H-H) | 
 [ 22888-59-1 ]
                                                    
                                                    [ 22888-59-1 ]

| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| With triethylamine; In dichloromethane; water; | EXAMPLE 1 To a solution of 1.0 gram of <strong>[22888-59-1]L-arginine methyl ester dihydrochloride</strong> in 50 ml of dichloromethane and 1.15 gram of triethylamine, was added 1.03 gram of 6-dimethylamino-2-naphthalenesulfonylchloride with stirring at room temperature. After being stirred for 5 hours at room temperature, the reaction mixture was poured into 30 ml of water. After separation of the aqueous layer, the dichloromethane solution was dried over anhydrous Na2 SO4, and filtered off, and then the solution was evaporated under reduced pressure to give N2 -(6-dimethylamino-2-naphthalenesulfonyl)-L-arginine methyl ester. |