 
                                
                                 
                                
                                
                                    Structure of Fmoc-Phe(4-NO2)-OH
                                    
                                    
CAS No.: 95753-55-2
                                    
                                
 
                                 
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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. : | 95753-55-2 | 
| Formula : | C24H20N2O6 | 
| M.W : | 432.43 | 
| SMILES Code : | O=C(O)[C@H](CC1=CC=C([N+]([O-])=O)C=C1)NC(OCC2C3=CC=CC=C3C4=CC=CC=C24)=O | 
| MDL No. : | MFCD00057810 | 
| InChI Key : | RZRRJPNDKJOLHI-QFIPXVFZSA-N | 
| Pubchem ID : | 7016054 | 
| GHS Pictogram: |   | 
| Signal Word: | Warning | 
| Hazard Statements: | 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 | 
|---|---|---|
| 67% | With sodium hydroxide; In water; acetonitrile; at 20℃; for 3h; | A solution of 80 mL of acetonitrile was added to a suspension of 37.7 g (0.179 mol) of acid 2a and 2b in 200 mL of 2% NaOH aqueous solution until complete dissolution. A solution of 61.8 g (0.183 mol) of suspension of Fmoc-OSu in 100 mL of acetonitrile was added to this solution. The reaction mixture was stirred for 3 hours at room temperature and acidified with 5% HCl to pH 4-5. The precipitated white crystals were filtered off, washed with ethyl acetate, and dried. The reaction product was recrystallized from ethanol-dioxane mixture, 50 : 50. Yield 67% (3a), 71% (3b). mp 230C (mp 233-234C [10]). IR spectrum nu, cm-1: 3429, 3202, 1724, 1693, 1601, 1520, 1447, 1354, 1223, 1057, 856, 760, 741. 1 NMR spectrum (DMSO-d6), delta, ppm: 2.90-3.09 m (1H, CH2), 3.25 d.d (1H, CH2, 2J 13.7, 3J 4.3 Hz), 4.13-4.34 m (4H, 2CH2, 2CH), 7.23-7.45 m (4Harom), 7.54 d (2Harom, 3J 8.6 Hz), 7.60-7.64 m (2Harom), 7.79 d (1H, NH, 3J 8.6 Hz), 7.88 d (2Harom, 3J 7.5 Hz ), 8.14 d (2Harom, 3J 8.6 Hz ), 12.93 s (1H, COOH). 13 NMR spectrum (DMSO-d6), delta, ppm: 36.62 (CH2), 47.03 (CH), 55.25 (CH), 66.03 (CH2), 120.56, 123.69, 125.62, 127.45, 128.07, 130.94, 141.16, 144.20, 146.73 (arom), 156.39 (CONH), 173.27 (COOH). Mass spectrum (ESI), m/z: 455.1214 [M + Na]+. C24H20N2O6. Calculated M 432.1321. | 
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