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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. : | 40230-24-8 | 
| Formula : | C16H13N3 | 
| M.W : | 247.30 | 
| SMILES Code : | NC1=NC(C2=CC=CC=C2)=CC(C3=CC=CC=C3)=N1 | 
| MDL No. : | MFCD00234910 | 
| InChI Key : | KZUCBEYDRUCBCS-UHFFFAOYSA-N | 
| Pubchem ID : | 619024 | 
| GHS Pictogram: |   | 
| Signal Word: | Warning | 
| Hazard Statements: | H302 | 
| Precautionary Statements: | P280-P305+P351+P338 | 
| Num. heavy atoms | 19 | 
| Num. arom. heavy atoms | 18 | 
| Fraction Csp3 | 0.0 | 
| Num. rotatable bonds | 2 | 
| Num. H-bond acceptors | 2.0 | 
| Num. H-bond donors | 1.0 | 
| Molar Refractivity | 77.31 | 
| TPSA ? Topological Polar Surface Area: Calculated from  | 51.8 Ų | 
| Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from  | 2.53 | 
| Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by  | 3.18 | 
| Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from  | 3.4 | 
| Log Po/w (MLOGP)? MLOGP: Topological method implemented from  | 2.49 | 
| Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by  | 3.28 | 
| Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions | 2.98 | 
| Log S (ESOL):? ESOL: Topological method implemented from  | -3.95 | 
| Solubility | 0.028 mg/ml ; 0.000113 mol/l | 
| Class? Solubility class: Log S scale  | Soluble | 
| Log S (Ali)? Ali: Topological method implemented from  | -3.94 | 
| Solubility | 0.0285 mg/ml ; 0.000115 mol/l | 
| Class? Solubility class: Log S scale  | Soluble | 
| Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by  | -6.33 | 
| Solubility | 0.000115 mg/ml ; 0.000000465 mol/l | 
| Class? Solubility class: Log S scale  | Poorly soluble | 
| GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg | High | 
| BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg | Yes | 
| P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set)  | Yes | 
| CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) | Yes | 
| CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) | Yes | 
| CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) | No | 
| CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) | Yes | 
| CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) | Yes | 
| Log Kp (skin permeation)? Skin permeation: QSPR model implemented from  | -5.55 cm/s | 
| Lipinski? Lipinski (Pfizer) filter: implemented from  | 0.0 | 
| Ghose? Ghose filter: implemented from  | None | 
| Veber? Veber (GSK) filter: implemented from  | 0.0 | 
| Egan? Egan (Pharmacia) filter: implemented from  | 0.0 | 
| Muegge? Muegge (Bayer) filter: implemented from  | 0.0 | 
| Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat  | 0.55 | 
| PAINS? Pan Assay Interference Structures: implemented from  | 0.0 alert | 
| Brenk? Structural Alert: implemented from  | 0.0 alert: heavy_metal | 
| Leadlikeness? Leadlikeness: implemented from  | No; 1 violation:MW<1.0 | 
| Synthetic accessibility? Synthetic accessibility score:  from 1 (very easy) to 10 (very difficult) | 2.04 | 
* 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 potassium hydroxide; In ethanol; for 10h;Reflux; | 1,3-Diphenyl propen-2-one (0.01mol) (1) were taken in a 250 mL round bottom flask and dissolved in ethanol (25 mL). To this guanidine chloride (0.01 mol) and ethanolic KOH (5 mL of 40 %) were added. The reaction mixture was refluxed for 10 h. The mixture was then poured into water (ice-cold) and neutralized with dil. HCl. After neutralization, the solid was filtered, washed with excess of water, dried and recrystallized from ethanol from ethanol to give pure product. Spectral data for compound 2: The IR of compound 2 exhibited nu (C=C) stretching = 1537-1494 cm-1, nu(N-H) (1 amine) stretching = 3302 cm-1 and 3475 cm-1, nu (C-N) stretching = 1220.98 cm-1, nu(C-H)(Sp2) stretching = 3180.72 cm-1. 1H NMR (400 MHz, DMSO-d6) delta ppm: 3.43 (s, 3H,-OCH3), 5.1 (s, 2H, -NH2), 7.0 to 8.0 (m, 20H, Ar-H and NH) [9]. | 
| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| 34% | With triethylamine; In 1,4-dioxane;Heating / reflux; | To a solution of <strong>[40230-24-8]2-amino-4,6-diphenylpyrimidine</strong> (0.202 mmol, 1 eq. ) in 1,4- dioxane (5mL) was added triethylamine (0.223 mmol, 1.1 eq. ), followed by the appropriate acid chloride (0.304 mmol, 1.5 eq. ). This was then stirred at reflux until no starting material was visible by TLC. Upon completion, the reaction mixture was separated between ethyl acetate (20 mL) and water (20 mL). The aqueous layer was further extracted with ethyl acetate (2 x 20 mL) and the combined organics washed with water and brine. After drying over MgSO¢ and evaporation under reduced pressure, the crude product was purified by column chromatography, eluting with a petroleum ether-ethyl acetate or a dichloromethane-methanol solvent system. Recrystallisation with ethanol or petroleum ether-ethyl acetate gave the corresponding amide in crystalline form. N- (4, 6-Diphenyl-pyrimidin-2-yl) -benzamide (9). Yield 34%; white solid; mp 169-170 C ; 1H NMR 8 (CDC13) : 8.75 (br s, 1H, N-H), 8. 22-8. 17 (m, 4H, ar), 8. 02-7. 98 (m, 2H, ar), 7.90 (s, 1H, pyrimidine-Il), 7.56-7. 52 (m, 9H, ar) ppm. 13C NMR o (CDC13) : 166.1, 136.5, 132.1, 131.0, 128.9, 128.7, 127.2, 108.1 ppm. MS (ES+): 351.50 Da. Anal. (C23Hl7N30) C, H, N. | 
| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| 31% | With sodium hydroxide; In ethanol; water; for 6h;Heating / reflux; | A mixture benzylidenacetophenone (38. 6 g, 0.185 mol, 1.1 eq. ) and guanidine hydrochloride (16 g, 0.168 mol, 1 eq. ) were refluxed in ethanol (150 mL). Sodium hydroxide (21.6 g, 0.539 mol, 3.2 eq. ) was dissolved in a minimum amount of water (40mL), and added dropwise to the refluxing mixture. The reaction mixture was then stirred at reflux for a further 6 h. Upon cooling, the reaction mixture was concentrated and then separated between ethyl acetate (200 mL) and water (200 mL). The aqueous layer was then extracted with ethyl acetate (2 x 100 mL). The combined organics were washed with water (200 mL) and brine (200 mL), dried over MgSO¢, and concentrated in vacuo. The crude product was then purified by column chromatography on Si02, eluting with dichloromethane. Recrystallisation from ethyl acetate gave clear colourless crystals yield 31% ; 1H NMR 8 (CDCIs) : 8. 09-8.04 (m, 4H, Ar), 7.54- 7.48 (m, 7H, Ar), 5. 25 (br s, 2H, NH2). | 
 [ 614-47-1 ]
                                                    
                                                    [ 614-47-1 ]

 [ 40230-24-8 ]
                                                    
                                                    [ 40230-24-8 ]| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| 88.9% | 98.9 g (0.4 mol) of 2-amino-4,6-diphenyl-1,3-pyrimidine (compound 1) are introduced into a solution consisting of 1.5 l of water and 1 l of concentrated sulfuric acid. A solution of 75.0 g (1.088 mol) of sodium nitrite in 500 ml of water is added dropwise below the surface of the yellow suspension over the course of 25 hours. After 20 hours at 20-25 C. the yellow suspension is poured into 15 l of water and is rendered alkaline using 2.25 l of 25% aq. ammonia. The product precipitates as a beige solid. It is filtered off, washed with water and dried in a vacuum oven. 88.3 g (=88.9% yield) of beige crystals are obtained of the formula [C00057] [00399] with a melting point of 234-236 C. | 
| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| 35.6% | With potassium methanolate; In ethanol; at 70℃; for 20.67h;Heating / reflux; | 212.6 g (1.0 mol) of 98% 1,3-diphenyl-2-propen-1-one, 249.1 g (2.0 mol) of 98% guanidine nitrate and 1.51 of absolute ethanol are initially introduced at 70 C. 289.2 g (4.0 mol) of 97% potassium methoxide are then added in portions to the white suspension over the course of 40 minutes. After 20 hours at reflux, the yellow suspension is cooled to 50 C. and poured into 6 l of water, extracted with ethyl acetate, and concentrated by evaporation and the residue is recrystallized from isopropanol. 88.1 g of pale yellow crystals are obtained of the compound 1 [C00056] [00397] (=35.6% yield) with a melting point of 134-136 C. | 
| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| 81% | With tetrakis(triphenylphosphine) palladium(0); caesium carbonate; In 1,4-dioxane; water; at 100℃; for 12h; | General procedure: Starting 2-amino-4,6-dichloropyrimidine derivative(1.36 mmol), boronic acid (2.05 mmol), tetrakis(-triphenylphosphine)palladium (58 mg, 0.05 mmol) and cesiumcarbonate (653 mg, 2.01 mmol) were dissolved in a dioxane/watermixture (4:1, 50 mL). The reaction was heated to 100 omicronCfor 12 h.After cooling to room temperature the solvents were removed invacuo. The residue was dissolvedin ethyl acetate (100 mL) and adsorbed on silica gel. After removal of the organic solvent in vacuothe product was purified on silica gel column chromatographyusing a hexane/ethyl acetate mixture (4:1) as the eluent and subsequentlyon C-18 reverse chromatography column using water/methanol eluent (0-100% gradient). 4.1.2.1. 4,6-Diphenylpyrimidin-2-amine (5a). Yield 81%, white solid. 1H NMR delta H (400 MHz, DMSO-d6) 8.26-8.19 (m, 4H), 7.71 (s, 1H),7.53 (p, J 3.8, 3.3 Hz, 6H), 6.76 (s, 2H). 13C NMR delta C (100 MHz,DMSO-d6) delta 165.32, 164.48, 137.81, 130.90, 129.07, 127.44, 102.30.HRMS (EI) m/z [M]+ calcd for C16H13N3: 247.1109, found: 247.1108 | 
| 75% | With tetrakis(triphenylphosphine) palladium(0); sodium carbonate; In ethanol; water; toluene; at 100℃; for 3h;Inert atmosphere; | Under a nitrogen atmosphere, 20.0 g (0.12 mol) of 2-amino-4,6-dichloropyrimidine, 24.7 g (0.27 mol) of phenylboronic acid, 3.1 g (0.0027 mol) of tetrakis(triphenylphosphine)palladium[0], 400 ml of toluene, and 100 ml of ethanol were loaded and stirred. An aqueous solution of sodium carbonate obtained by dissolving 85.9 g (0.81 mol) of sodium carbonate in 400 ml of water was added to the mixture, and then the whole was stirred at 100C for 3 hr. The reaction solution was cooled to room temperature. The organic layer was washed with distilled water (2×100 ml) and then the resultant organic layer was dried with anhydrous magnesium sulfate. After that, magnesium sulfate was separated by filtration and then the solvent was distilled off under reduced pressure. The resultant residue was purified by column chromatography to provide 22.3 g (0.09 mol, 75% yield) of an intermediate A-6. | 
| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| 73% | With hydrogen bromide; bromine; sodium nitrite; at -20 - 20℃; for 3h; | 50 mL of 48% HBr was added to 10 g (40 mmol) of <strong>[40230-24-8]2-amino-4,6-diphenylpyrimidine</strong> and stirred to obtain a solution. The solution was then cooled down to about -20 C., and 2.5 mL (48 mmol) of bromine was added dropwise thereto. 2.8 g (40 mmol) of sodium nitrite was then added and the resulting reaction mixture was stirred at room temperature for about 3 hours. After completion of the reaction, the reaction mixture was extracted using ethyl acetate. The organic layer was then dried using anhydrous magnesium sulfate and the solvent was removed by distillation under reduced pressure. The residue was purified using column chromatography to obtain 9.1 g of 2-bromo-4,6-diphenylpyrimidine (Yield: 73%). | 
| Yield | Reaction Conditions | Operation in experiment | 
|---|---|---|
| 78% | With N-Bromosuccinimide; In acetonitrile; for 8h; | <strong>[40230-24-8]4,6-diphenyl-2-pyrimidinamine</strong> (9.89 g, 40 mmol) was dissolved in acetonitrile (CH3CN) (100 mL) and N-bromosuccinimide (N-bromosuccinimide) (7.1 g, 40 mmol). After 8 hours, the reaction was terminated by adding distilled water and extracted twice with 400 mL of ethyl acetate. The organic layer was washed with an aqueous solution of sodium hydrogencarbonate and water, and then the obtained organic layer was dried over anhydrous sodium sulfate (MgSO4). After filtration, the solvent was distilled off under reduced pressure to obtain 10.1 g (31 mmol, 78%) of white solid A. | 
| 78% | With N-Bromosuccinimide; In acetonitrile; for 8h; | 4,6-Diphenyl-2-pyrimidinamine (9.89 g, 40 mmol) was dissolved in 100 mL of acetonitrile and N-bromosuccinimide (7.1 g, 40 mmol) was added. After 8 hours, distilled water was added to terminate the reaction and extracted twice with 400 mL of ethyl acetate.The organic layer was washed with an aqueous solution of sodium hydrogencarbonate and water, and then the obtained organic layer was dried over anhydrous sodium sulfate.This was filtrated and the solvent was distilled off under reduced pressure to obtain 10.1 g (31 mmol, yield: 78%) of a white solid compound A. | 

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