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Chemical Structure| 791-28-6 Chemical Structure| 791-28-6

Structure of Triphenylphosphine oxide
CAS No.: 791-28-6

Chemical Structure| 791-28-6

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Synonyms: TPPO; Triphenyl phosphorus oxide; Triphenylphosphine monoxide

4.5 *For Research Use Only !

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Product Details of [ 791-28-6 ]

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

Safety of [ 791-28-6 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H412
Precautionary Statements:P264-P270-P273-P301+P312-P501

Computational Chemistry of [ 791-28-6 ] Show Less

Physicochemical Properties

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
Ertl P. et al. 2000 J. Med. Chem.

26.88 Ų

Lipophilicity

Log Po/w (iLOGP)?

iLOGP: in-house physics-based method implemented from
Daina A et al. 2014 J. Chem. Inf. Model.

2.76
Log Po/w (XLOGP3)?

XLOGP3: Atomistic and knowledge-based method calculated by
XLOGP program, version 3.2.2, courtesy of CCBG, Shanghai Institute of Organic Chemistry

2.83
Log Po/w (WLOGP)?

WLOGP: Atomistic method implemented from
Wildman SA and Crippen GM. 1999 J. Chem. Inf. Model.

3.33
Log Po/w (MLOGP)?

MLOGP: Topological method implemented from
Moriguchi I. et al. 1992 Chem. Pharm. Bull.
Moriguchi I. et al. 1994 Chem. Pharm. Bull.
Lipinski PA. et al. 2001 Adv. Drug. Deliv. Rev.

4.02
Log Po/w (SILICOS-IT)?

SILICOS-IT: Hybrid fragmental/topological method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

4.13
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

3.41

Water Solubility

Log S (ESOL):?

ESOL: Topological method implemented from
Delaney JS. 2004 J. Chem. Inf. Model.

-3.82
Solubility 0.0425 mg/ml ; 0.000153 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble
Log S (Ali)?

Ali: Topological method implemented from
Ali J. et al. 2012 J. Chem. Inf. Model.

-3.05
Solubility 0.247 mg/ml ; 0.000886 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble
Log S (SILICOS-IT)?

SILICOS-IT: Fragmental method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

-7.45
Solubility 0.00000997 mg/ml ; 0.0000000358 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Poorly soluble

Pharmacokinetics

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)
and tested on 415 molecules (test set)
10-fold CV: ACC=0.72 / AUC=0.77
External: ACC=0.88 / AUC=0.94

No
CYP1A2 inhibitor?

Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.83 / AUC=0.90
External: ACC=0.84 / AUC=0.91

Yes
CYP2C19 inhibitor?

Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.80 / AUC=0.86
External: ACC=0.80 / AUC=0.87

Yes
CYP2C9 inhibitor?

Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set)
and tested on 2075 molecules (test set)
10-fold CV: ACC=0.78 / AUC=0.85
External: ACC=0.71 / AUC=0.81

Yes
CYP2D6 inhibitor?

Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set)
and tested on 1068 molecules (test set)
10-fold CV: ACC=0.79 / AUC=0.85
External: ACC=0.81 / AUC=0.87

Yes
CYP3A4 inhibitor?

Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set)
and tested on 2579 molecules (test set)
10-fold CV: ACC=0.77 / AUC=0.85
External: ACC=0.78 / AUC=0.86

No
Log Kp (skin permeation)?

Skin permeation: QSPR model implemented from
Potts RO and Guy RH. 1992 Pharm. Res.

-5.99 cm/s

Druglikeness

Lipinski?

Lipinski (Pfizer) filter: implemented from
Lipinski CA. et al. 2001 Adv. Drug Deliv. Rev.
MW ≤ 500
MLOGP ≤ 4.15
N or O ≤ 10
NH or OH ≤ 5

0.0
Ghose?

Ghose filter: implemented from
Ghose AK. et al. 1999 J. Comb. Chem.
160 ≤ MW ≤ 480
-0.4 ≤ WLOGP ≤ 5.6
40 ≤ MR ≤ 130
20 ≤ atoms ≤ 70

None
Veber?

Veber (GSK) filter: implemented from
Veber DF. et al. 2002 J. Med. Chem.
Rotatable bonds ≤ 10
TPSA ≤ 140

0.0
Egan?

Egan (Pharmacia) filter: implemented from
Egan WJ. et al. 2000 J. Med. Chem.
WLOGP ≤ 5.88
TPSA ≤ 131.6

0.0
Muegge?

Muegge (Bayer) filter: implemented from
Muegge I. et al. 2001 J. Med. Chem.
200 ≤ MW ≤ 600
-2 ≤ XLOGP ≤ 5
TPSA ≤ 150
Num. rings ≤ 7
Num. carbon > 4
Num. heteroatoms > 1
Num. rotatable bonds ≤ 15
H-bond acc. ≤ 10
H-bond don. ≤ 5

0.0
Bioavailability Score?

Abbott Bioavailability Score: Probability of F > 10% in rat
implemented from
Martin YC. 2005 J. Med. Chem.

0.55

Medicinal Chemistry

PAINS?

Pan Assay Interference Structures: implemented from
Baell JB. & Holloway GA. 2010 J. Med. Chem.

0.0 alert
Brenk?

Structural Alert: implemented from
Brenk R. et al. 2008 ChemMedChem

1.0 alert: heavy_metal
Leadlikeness?

Leadlikeness: implemented from
Teague SJ. 1999 Angew. Chem. Int. Ed.
250 ≤ MW ≤ 350
XLOGP ≤ 3.5
Num. rotatable bonds ≤ 7

No; 1 violation:MW<0.0
Synthetic accessibility?

Synthetic accessibility score: from 1 (very easy) to 10 (very difficult)
based on 1024 fragmental contributions (FP2) modulated by size and complexity penaties,
trained on 12'782'590 molecules and tested on 40 external molecules (r2 = 0.94)

4.1

Application In Synthesis of [ 791-28-6 ]

* 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.

  • Downstream synthetic route of [ 791-28-6 ]

[ 791-28-6 ] Synthesis Path-Downstream   1~28

  • 1
  • [ 113234-63-2 ]
  • [ 3131-63-3 ]
  • [ 4265-25-2 ]
  • [ 791-28-6 ]
  • 2
  • [ 113234-63-2 ]
  • [ 4265-25-2 ]
  • [ 66021-98-5 ]
  • [ 791-28-6 ]
  • 3
  • [ 113234-66-5 ]
  • [ 7522-79-4 ]
  • [ 3131-63-3 ]
  • [ 4265-25-2 ]
  • [ 791-28-6 ]
  • 4
  • [ 113234-67-6 ]
  • [ 7522-79-4 ]
  • [ 3131-63-3 ]
  • [ 4265-25-2 ]
  • [ 791-28-6 ]
  • 5
  • [ 113234-68-7 ]
  • [ 106-98-9 ]
  • [ 7522-79-4 ]
  • [ 3131-63-3 ]
  • [ 4265-25-2 ]
  • [ 791-28-6 ]
  • 6
  • [ 63072-14-0 ]
  • [ 100-10-7 ]
  • [ 28081-19-8 ]
  • [ 791-28-6 ]
  • 7
  • C28H22(2)H3O2P [ No CAS ]
  • [ 4265-25-2 ]
  • 2-(2,2,2-trideuterioethyl)benzofuran [ No CAS ]
  • [ 791-28-6 ]
  • 8
  • C31H28(2)H3O2P [ No CAS ]
  • [ 7522-79-4 ]
  • [ 187737-37-7 ]
  • [ 4265-25-2 ]
  • 2-(2,2,2-trideuterioethyl)benzofuran [ No CAS ]
  • [ 791-28-6 ]
  • 9
  • {4-[1-(4-Nitro-benzoyloxy)-ethyl]-phenyl}-triphenyl-phosphonium [ No CAS ]
  • [ 3847-57-2 ]
  • [ 98-86-2 ]
  • [ 791-28-6 ]
  • 12
  • o-(1-methylbenzimidazol-2-yl)phenyl(triphenyl)phosphonium bromide [ No CAS ]
  • [ 2622-63-1 ]
  • [ 791-28-6 ]
  • 13
  • [ 635712-99-1 ]
  • [ 16847-90-8 ]
  • ethyl (2Z)-3-[6-(benzyloxy)pyridin-3-yl]-2-ethoxyacrylate [ No CAS ]
  • [ 791-28-6 ]
YieldReaction ConditionsOperation 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).
  • 14
  • [ 14221-01-3 ]
  • [ 1007882-04-3 ]
  • [ 1007882-12-3 ]
  • [ 1007882-23-6 ]
  • [ 791-28-6 ]
YieldReaction ConditionsOperation 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.
  • 15
  • [ 5182-44-5 ]
  • [ 16799-05-6 ]
  • [ 791-28-6 ]
YieldReaction ConditionsOperation 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.
  • 16
  • [ 15121-84-3 ]
  • [ 16793-89-8 ]
  • [ 791-28-6 ]
YieldReaction ConditionsOperation 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).
  • 17
  • [ 75-44-5 ]
  • [ 1193-24-4 ]
  • [ 791-28-6 ]
  • [ 2526-64-9 ]
  • [ 1193-21-1 ]
YieldReaction ConditionsOperation 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.
  • 18
  • [ 74650-72-9 ]
  • [ 791-28-6 ]
  • [ 74650-73-0 ]
YieldReaction ConditionsOperation 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.
  • 19
  • [ 14154-42-8 ]
  • [ 791-28-6 ]
  • AlCl((C6H5)3PO)(C6H4C2N2)4 [ No CAS ]
  • 20
  • [ 1095-03-0 ]
  • [ 791-28-6 ]
  • [ 850255-98-0 ]
  • 21
  • [ 1330575-74-0 ]
  • [ 603-35-0 ]
  • [ 53951-84-1 ]
  • [ 791-28-6 ]
  • 22
  • [ 1330575-73-9 ]
  • [ 53951-84-1 ]
  • [ 791-28-6 ]
  • 23
  • [ 50607-30-2 ]
  • 4-chloro-5,6-dihydropyridin-2(1H)-one [ No CAS ]
  • [ 791-28-6 ]
  • 24
  • [ 51716-63-3 ]
  • [ 2325-27-1 ]
  • N,N'-(tetrahydropentalene-2,5(1H,3H)-diylidene)dianiline [ No CAS ]
  • 5-(phenylamino)-3,3a,6,6a-tetrahydropentalen-2(1H)-one [ No CAS ]
  • [ 791-28-6 ]
  • 25
  • [ 51716-63-3 ]
  • [ 2224-32-0 ]
  • [ 139607-41-3 ]
  • [ 791-28-6 ]
  • 26
  • [ 51716-63-3 ]
  • [ 16640-68-9 ]
  • 2,2'-(tetrahydropentalene-2,5(1H,3H)-diylidene)diacetonitrile [ No CAS ]
  • [ 791-28-6 ]
  • 27
  • [ 42867-45-8 ]
  • [ 51716-63-3 ]
  • 5-(dibromomethylene)hexahydropentalen-2(1H)-one [ No CAS ]
  • [ 791-28-6 ]
  • 28
  • C20H30N4O6SSi [ No CAS ]
  • [ 791-28-6 ]
  • [ 147118-35-2 ]
YieldReaction ConditionsOperation 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%.
 

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