Structure of Triphenylphosphine oxide
CAS No.: 791-28-6
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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.
Synonyms: TPPO; Triphenyl phosphorus oxide; Triphenylphosphine monoxide
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CAS No. : | 791-28-6 |
Formula : | C18H15OP |
M.W : | 278.28 |
SMILES Code : | O=P(C1=CC=CC=C1)(C2=CC=CC=C2)C3=CC=CC=C3 |
Synonyms : |
TPPO; Triphenyl phosphorus oxide; Triphenylphosphine monoxide
|
MDL No. : | MFCD00002080 |
InChI Key : | FIQMHBFVRAXMOP-UHFFFAOYSA-N |
Pubchem ID : | 13097 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H412 |
Precautionary Statements: | P264-P270-P273-P301+P312-P501 |
Num. heavy atoms | 20 |
Num. arom. heavy atoms | 18 |
Fraction Csp3 | 0.0 |
Num. rotatable bonds | 3 |
Num. H-bond acceptors | 1.0 |
Num. H-bond donors | 0.0 |
Molar Refractivity | 85.83 |
TPSA ? Topological Polar Surface Area: Calculated from |
26.88 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.76 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
2.83 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
3.33 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
4.02 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
4.13 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
3.41 |
Log S (ESOL):? ESOL: Topological method implemented from |
-3.82 |
Solubility | 0.0425 mg/ml ; 0.000153 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (Ali)? Ali: Topological method implemented from |
-3.05 |
Solubility | 0.247 mg/ml ; 0.000886 mol/l |
Class? Solubility class: Log S scale |
Soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-7.45 |
Solubility | 0.00000997 mg/ml ; 0.0000000358 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) |
No |
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) |
Yes |
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) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-5.99 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 |
1.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<0.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
4.1 |
* 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 N,N,N1,N1-tetramethylguanidine; ammonium chloride; In chloroform; | Preparation d-5 Ethyl (2Z)-3-[6-(benzyloxy)pyridin-3-yl]-2-ethoxyacrylate To a solution of <strong>[635712-99-1]6-(benzyloxy)nicotinaldehyde</strong> (1.0 eq., 33.1 mmol, 7.05 g) and (1,2-diethoxy-2-oxoethyl)(triphenyl)phosphonium chloride (2.0 eq., 66.2 mmol, 28.4 g) in chloroform (165 mL, 0.2 M) was added tetramethylguanidine (3.0 eq., 99.3 mmol, 11.4 g). The flask was capped with a hollow glass stopper and stirred at room temperature overnight. TLC analysis after approximately 18 hours indicated the presence of a small amount of unreacted starting material. The reaction mixture was heated to reflux and TLC reanalyzed after 2 hours. The reaction was quenched with saturated ammonium chloride. The layers were separated and the organic layer was washed with brine, dried over magnesium sulfate and concentrated in vacua. A large amount of triphenylphosphine oxide precipitated. The residue was triturated with ether and filtered. Washed filter cake with ether and concentrated combined filtrates in vacuo to afford a pale yellow solid which was dissolved in a minimal amount of DCM and loaded onto Biotage Sp4 65i and eluted over a gradient of 10-100% hexanes to ethyl acetate. Obtained 12.3 g of a clear, colorless oil (37.6 mmol, quant.). LRMS: 328 (M+H)+. 1H NMR (DMSO-d6, 400 MHz): delta 8.33 (1 H, s) 7.92 (1 H, d, J=8.0 Hz) 7.31-7.43 (5 H, m) 6.76 (1 H, d, J=8.1 Hz) 6.60 (1 H, s) 5.37 (2 H, s) 4.23 (2 H, q, J=7.1 Hz) 3.90-3.99 (2 H, m) 1,34 (6 H, dt, J=15.8, 7.0 Hz). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sodium hydrogencarbonate; In 1,2-dimethoxyethane; water; at 80℃; for 5.75h; | Example 1, Step d di-tert-butyl (2S,2'S)-2,2'-(4,4'-biphenyldiylbis(]H-imidazole-5,2-diyl))di(1-pyrrolidinecarboxylate) Pd(Ph3P)4 (59.9 mg, 0.0518 mmol) was added to a mixture of bromide 1b (576.1 mg, 1.469 mmol), boronate 1c (621.8 mg, 1.415 mmol), NaHCO3 (400.4 mg, 4.766 mmol) in 1,2-dimethoxyethane (12 mL) and water (4 mL). The reaction mixture was flushed with nitrogen, heated with an oil bath at 80 C. for 5.75 hours, and then the volatile component was removed in vacuo. The residue was partitioned between 20% methanol/CHCl3 (60 mL) and water (30 mL), and the aqueous phase was extracted with 20% methanol/CHCl3 (30 mL). The combined organic phase was washed with brine, dried (MgSO4), filtered, and concentrated in vacuo. A silica gel mesh was prepared from the resulting crude material and submitted to flash chromatography (ethyl acetate) to provide dimer id, contaminated with Ph3PO, as an off-white solid (563 mg). 1H NMR (DMSO-d6, delta=2.5 ppm, 400 MHz): 6 12.21-12-16/11.95-11.78 (m, 2H), 7.85-7.48/7.32-7.25 (m, 10H), 4.90-4.71 (m, 2H), 3.60-3.32 (m, 4H), 2.30-1.79 (m, 8H), 1.46-1.10 (m, 18H). LC (Cond. 1b): RT=1.77 min; LC/MS: Anal. Calcd. for [M+H]+C36H45BN6O4: 625.35; found 625.48. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
57% | With carbon tetrabromide; triphenylphosphine; In dichloromethane; at 20℃; for 18h;Product distribution / selectivity; | To a solution of 2- (3-chlorophenyl) ethanol (1.06 g, 6.0 mmol) in CH2CL2 (50 mL) at RT under nitrogen was added CBr4 (1.98 g, 5.8 mmol) and PPh3 (1.57 g, 5.8 mmol). After stirring at RT for 18 h the reaction mixture was concentrated and the residue diluted with ETZO (30 mL) resulting in precipitation of triphenylphosphine oxide. The ethereal solution was decanted, evaporated and purified via flash chromatography (silica, hexane) to provide 2- (3-CHLORO) phenylethyl bromide as a clear oil (57%). 1H NMR (400 MHz, DMSO-d6) 8 7.39-7. 22 (m, 3 H), 7.18-7. 09 (m, 1 H), 3.63-3. 51 (m, 2 H), 3.25-3. 17 (m, 2 H); 13C NMR (100.6 MHz, DMSO-d6) B 141.2, 134.6, 130.7, 129.3, 127.6, 127.3. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With carbon tetrabromide; triphenylphosphine; In dichloromethane; at 0℃; | Triphenylphosphine (39.2 g, 0.150 mol) and carbon TETRABROMIDE (49.5 g, 0.150 mol) were added sequentially to a solution of 2- (2-hydroxyethyl)-nitrobenzene (25.0 g, 0.150 mol) in methylene chloride (400 mL) at OOC. The reaction was stirred overnight and quenched with saturated sodium bicarbonate solution. The methylene chloride phase was washed with saturated brine and dried over magnesium sulfate. The crude product was treated with ethyl acetate, and the precipitated triphenylphosphine oxide removed by filtration. Further purification by flash chromatography by (silica gel, 0-10percent ethyl acetate in hexane gradient elution) produced the title compound (27.9 g). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In chlorobenzene; | EXAMPLE 12 4,6-Dihydroxypyrimidine (0.5 g, 4.46 mmol) was suspended in chlorobenzene (10 ml) and dichlorotriphenylphosphorane (1.44 g, 4.46 mmol; previously prepared by the reaction of triphenylphosphine oxide with phosgene) was added as a solid. The mixture was stirred at 80 C. to 90 C. under a nitrogen atmosphere. Analysis by thin layer chromatography (tlc) of a sample removed after 90 minutes showed some 4,6-dichloropyrimidine formation. However, quite a lot of <strong>[1193-24-4]4,6-dihydroxypyrimidine</strong> remained out of solution. Another quantity of dichlorotriphenylphosphorane (1.44 g, 4.46 mmol) was added and stirring continued for a further hour at 110 C. A cloudy yellow solution was obtained with a solid residue. Analysis by tlc confirmed the formation of 4,6-dichloropyrimidine. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
6.2 g (86%) | With trifluoromethylsulfonic anhydride; In dichloromethane; | (E) Preparation of 2-chloro-5-methoxynicotinonitrile Into a flame dried flask under N2 was placed triphenylphosphine oxide (12.0 g, 0.04 mol) and CH2 Cl2 (50 mL) and the mixture cooled to 0-4 C. A solution of triflic anhydride (6.75 ml, 0.04 mol) in CH2 Cl2 (80 mL) was added dropwise. After the addition, the solution was stirred for 15 min. and 2-chloro-5-methoxynicotinamide (8.0 g, 0.04 mol) was added portionwise over 15 minutes. The mixture was allowed to warm to room temperature with stirring overnight, poured into saturated Na2 CO3 solution and extracted with CHCl3 (2*). After concentration, the residue was chromatographed on silica gel and the product eluted with CHCl3 to yield 6.2 g (86%) of 2-chloro-5-methoxynicotinonitrile 1 H NMR (CDCl3) delta3.9 (3H, s), 7.5 (1H, d, J=3) and 8.3 (1H, d, J=3); (nujol) 2250 cm- 1. |
6.2 g (86%) | With trifluoromethylsulfonic anhydride; In dichloromethane; | (E) Preparation of 2-chloro-5-methoxynicotinonitrile Into a flame dried flask under N2 was placed triphenylphosphine oxide (12.0 g, 0.04 mol) and CH2 Cl2 (50 mL) and the mixture cooled to 0-4 C. A solution of triflic anhydride (6.75 ml, 0.04 mol) in CH2 Cl2 (80 mL) was added dropwise. After the addition, the solution was stirred for 15 min. and 2-chloro-5-methoxynicotinamide (8.0 g, 0.04 mol) was added portionwise over 15 minutes. The mixture was allowed to warm to room temperature with stirring overnight, poured into saturated Na2 CO3 solution and extracted with CHCl3 (2X). After concentration, the residue was chromatographed on silica gel and the product eluted with CHCl3 to yield 6.2 g (86%) of 2-chloro-5-methoxynicotinonitrile 1 H NMR (CDCl3) delta 3.9 (3H, s), 7.5 (1H, d, J=3) and 8.3 (1H, d, J=3); (nujol) 2250 cm-1. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
77.6% | With sodium hexamethyldisilazane; 3,5-dimethyl-4H-pyrazole; trifluoroacetic anhydride; In tetrahydrofuran; at -60 - 20℃; for 2.5h;Inert atmosphere; | Put 15 g of triphenylphosphine oxide,0.5 g of 3,5-dimethyl-4H-pyrazole,Trifluoroacetic anhydride 0.55g,Dissolve in 100 ml of tetrahydrofuran for use.25 g of the compound III obtained above,Add 200 ml of anhydrous tetrahydrofuran,Nitrogen protection,Cool to -60 ~ -50 C,Add 2mol/L NaHMDS 30ml,After the drop,The above prepared triphenylphosphine oxide solution is added dropwise,Reaction for 2 hours,Slowly warm up to 20 C,Keep it for 0.5 hours.Pour the reaction solution into 2% ammonium chloride ice water.Stir for 10min,The aqueous phase was extracted with 200 ml of toluene.50 ml of toluene is extracted once more.Wash 100ml of water twice,Filtered through diatomaceous earth,Concentrated under reduced pressure,Add 50 ml of cyclohexane,Heated to 60 C,Filtered through diatomaceous earth,Cool to 10 C,Keep warm for more than 5 hours,filter,Vacuum drying to obtain 21.5 g of methyl (3R)-tert-butyldimethoxysiloxy-5-oxo-6-triphenylphosphanylidenehexanoate (I) with a purity of 99.7%.The yield was 77.6%. |