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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. : | 34404-33-6 |
Formula : | C12H18N2O6 |
M.W : | 286.28 |
SMILES Code : | CC(C)(C)OC(N[C@H](C)C(ON1C(CCC1=O)=O)=O)=O |
MDL No. : | MFCD00037907 |
InChI Key : | COMUWNFVTWKSDT-SSDOTTSWSA-N |
Pubchem ID : | 11580086 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
* 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.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With dicyclohexyl-carbodiimide; at 0℃; | General procedure: The general scheme for the synthesis of AA-CAMderivatives is shown in Fig. S1 and the details ofchemical synthesis are provided in the SupplementaryMethods section. CAM [(1R,2R)-2-amino-1-(4--nitrophenyl)propane-1,3-diol)] was prepared asdescribed previously [23]. Amino acids with protectedalpha- and side-chain amino groups wereactivated by reaction with N-hydroxysuccinimide inthe presence of N,N?-dicyclohexylcarbodiimide at0 C. The resulting succinimide-reactive esters wereused for the acylation of CAM in the presence ofdiisopropylethylamine as a base at room temperature.Subsequent deprotection was achieved bytreatment of the obtained amino-acid CAM derivativeswith trifluoroacetic acid and appropriate scavengers.Synthesized AA-CAM derivatives were purifiedby columnchromatography on silica gel using suitablesystems of solvents. For generating N-acetylatedvariants of AA-CAM, additional acetylation wasperformed by reacting the unprotected AA-CAMderivatives with the N-acetylsuccinimide. Purity andchemical structures of obtained compounds wereconfirmed by HPLC, LC-MS, and NMR spectroscopy(see Supplementary Methods). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With hydrogenchloride; sodium hydrogencarbonate; In 1,4-dioxane; water; ethyl acetate; | (B) N-t-Butoxycarbonyl-D-alanyl-alphaL-aspartyl-L-phenylalanine methyl ester In 45 ml of water were dissolved 2.2 g of alpha-L-aspartyl-L-phenylalanine methyl ester and 0.6 g of sodium bicarbonate. A solution of 1.7 g of N-t-butoxycarbonyl-D-alanine N-hydroxysuccinimide ester in 45 ml of dioxane was added to the solution. The mixture was stirred at room temperature for 5 hours. After the pH was adjusted to 2.5 with 6N hydrochloric acid, 150 ml of ethyl acetate was added to the mixture. The separated ethyl acetate layer was washed with water and a saturated sodium chloride aqueous solution and then dried over anhydrous Glauber's salt. Glauber's salt was removed, and ethyl acetate was distilled off under reduced pressure. The residue was reprecipitated from ethyl acetate/hexane. Yield 2.0 g. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In water; at 0 - 20℃; for 24.25h; | To Boc-D-alanine N-hydroxysuccinimide ester (4.95 g, 17.3 mmol) was added 70% aq. ethyl amine (60 mL) via a dropping funnel over 15 min at 0 0C. The mixture was then allowed to stir at room temperature for 24 h. The solvent was removed by evaporation and the residue purified by silica-gel chromatography (2% MeOH/CHCl3) to afford 3.O g- 1H NMR (300 MHz, <n="66"/>DMSO-J6): 7.72 (bs, IH), 6.78 (d, J= 7.71 Hz, IH), 3.91-3.86 (m, IH), 3.10-2.98 (m, 2H), 1.37 (s, 9H), 1.14 (d, J= 7.14 Hz, 3H), 0.99 (t, J= 7.14 Hz, 3H). M/Z 216.2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
12% | With 1,8-diazabicyclo[5.4.0]undec-7-ene; In N,N-dimethyl-formamide; at 60℃; for 65h; | Step 1: Synthesis of 3-[(7-fluoroimidazo[1,2-a]quinoxalin-4-yl)amino]propyl (2R)-2-[(tert-butoxycarbonyl)amino]propanoate To a solution of commercially available (Peakdale) 3-[(7-fluoroimidazo[1,2-a]quinoxalin-4-yl)amino]propan-1-ol (20 mg, 0.08 mmol) and 1,8-diazabicyclo[5.4.0]undec-7-ene (12 muL, 0.08 mmol) in anhydrous dimethylformamide (600 muL) under argon was added dropwise a solution of tert-butyl {(1R)-2-[(2,5-dioxopyrrolidin-1-yl)oxy]-1-methyl-2-oxoethyl}carbamate (22 mg, 0.08 mmol) in anhydrous dimethylformamide (200 muL). The mixture was stirred at 60 C for 65h, then diluted with cold water and extracted four times with chloroform and once with chloroform/isopropanol (5:1). The combined organic layers were washed with brine, dried over sodium sulfate, filtered and evaporated. The crude product was purified by preparative TLC (silica, dichloromethane/methanol 20/1) to afford the title compuond as a colorless oil (4 mg, 12%). ESI-MS m/z 432 (M+H)+ |