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Chemical Structure| 156545-07-2 Chemical Structure| 156545-07-2

Structure of 3,5-Difluorophenylboronic acid
CAS No.: 156545-07-2

Chemical Structure| 156545-07-2

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Product Citations

Product Citations

Shaw, Alaric ; Bondarenko, Ivan ; Bhaniramka, Vanshika ; West, Munroe Alexandra ; Gilbert, Peter F ; Loya, Jesus Daniel , et al.

Abstract: Fluorination of organoboronic ester adducts via B ← N coordination enables the formation of photoactive solids capable of [2 + 2]-photodimerization, or confinement of a hydrocarbon guest (i.e., benzene). Specifically, self-assembly of organoboronic acids with varying levels and patterns of fluorination with catechol and 4-stilbazole resulted in T-shaped B ← N adducts, that organize into either photoactive dimeric assemblies (2,4- and 3,5-difluorophenlboronic acids) or photostable architectures that encapsulate benzene (2,4,6-trifluorophenylboronic and 2,3,5,6-tetrafluorophenylboronic acids). Combined crystallographic analysis, molecular modeling, and Hirshfeld surface analysis revealed the formation of photoactive adducts with up to two fluorine atoms to be driven by enhanced face-to-face [π…π] stacking aided by [C-H…π] contacts, while [C-H…F], [C-H…O], and [C-H…π] contacts in adducts with higher fluorination level sustained the inclusion of benzene molecules in the lattice. These findings support fluorination of organoboron systems as an effective strategy for property engineering in molecular materials.

Keywords: [2+2]-photocycloaddition ; boron ; crystal engineering ; self-assembly ; supramolecular chemistry

Purchased from AmBeed: ; ; ; ; 103-31-1

Alternative Products

Product Details of [ 156545-07-2 ]

CAS No. :156545-07-2
Formula : C6H5BF2O2
M.W : 157.91
SMILES Code : C1=C(C=C(F)C=C1F)B(O)O
MDL No. :MFCD01318138
InChI Key :QWQBQRYFWNIDOC-UHFFFAOYSA-N
Pubchem ID :2734338

Safety of [ 156545-07-2 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319
Precautionary Statements:P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313

Computational Chemistry of [ 156545-07-2 ] Show Less

Physicochemical Properties

Num. heavy atoms 11
Num. arom. heavy atoms 6
Fraction Csp3 0.0
Num. rotatable bonds 1
Num. H-bond acceptors 4.0
Num. H-bond donors 2.0
Molar Refractivity 36.18
TPSA ?

Topological Polar Surface Area: Calculated from
Ertl P. et al. 2000 J. Med. Chem.

40.46 Ų

Lipophilicity

Log Po/w (iLOGP)?

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

0.0
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

1.03
Log Po/w (WLOGP)?

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

0.49
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.

1.15
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

0.13
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

0.56

Water Solubility

Log S (ESOL):?

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

-1.81
Solubility 2.47 mg/ml ; 0.0156 mol/l
Class?

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

Very soluble
Log S (Ali)?

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

-1.47
Solubility 5.35 mg/ml ; 0.0339 mol/l
Class?

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

Very 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

-1.83
Solubility 2.31 mg/ml ; 0.0147 mol/l
Class?

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

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

No
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

No
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

No
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

No
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.

-6.53 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

1.0
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<1.0
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)

1.94

Application In Synthesis of [ 156545-07-2 ]

* 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 [ 156545-07-2 ]

[ 156545-07-2 ] Synthesis Path-Downstream   1~5

  • 1
  • [ 621-38-5 ]
  • [ 156545-07-2 ]
  • <i>N</i>-(3',5'-difluoro-biphenyl-3-yl)-acetamide [ No CAS ]
  • 2
  • [ 570-02-5 ]
  • [ 156545-07-2 ]
  • [ 1262967-21-4 ]
  • 3
  • [ 479691-42-4 ]
  • [ 156545-07-2 ]
  • [ 1567327-01-8 ]
YieldReaction ConditionsOperation in experiment
With tetrakis(triphenylphosphine) palladium(0); sodium carbonate; In 1,2-dimethoxyethane; at 95℃;Inert atmosphere; A mixture of tert-butyl 4-(2-chloropyrimidin-4-yl)piperazine-1-carboxylate (10.0g, 33.5mmol), (3,4-difluorophenyl)boronic acid (7.90 g, 50.2 mmol), 1M aq Na2CO3 (45 mL, 90.0 mmol), tetrakis(triphenylphosphine)palladium (0) (4.6 g, 4.02 mmol), and DME (300 mL) was stirred at 95 C overnight under N2 atmosphere. After cooling to room temperature, the mixture was stirred at room temperature for 15h, diluted with water, and extracted with EtOAc. The organic layer was dried over anhydrous MgSO4, and concentrated in vacuo to give 14 as a brown oil. This product was used for next reaction without further purification.
  • 4
  • [ 50670-58-1 ]
  • [ 156545-07-2 ]
  • [ 1608121-91-0 ]
YieldReaction ConditionsOperation in experiment
72% With tetrakis(triphenylphosphine) palladium(0); sodium carbonate; In ethanol; water; toluene;Inert atmosphere; Reflux; General procedure: To a solution of bromobiphenyl aldehyde 11 (390 mg, 1.5 mmol) and 4-fluoro phenyl boronic acid 12a (209.8 mg, 1.5 mmol) in 2 M aqueous sodium carbonate (2 mL) and toluene/ethanol (12:4 mL) is added a catalytic amount (0.4 mol %) of tetrakis-triphenylphosphine palladium, and the mixture was heated to reflux under argon atmosphere for 3-4 h. After completion of the reaction, the reaction mixture is cooled to room temperature and extracted with ethyl acetate (3 x 30 mL) and the organic phase was extracted with water and brine solution, dried over anhydrous Na2SO4 and the solvent was removed under reduced pressure to get the crude product. This crude product was further purified by column chromatography (10% ethyl acetate and hexane) to afford the pure terphenyl aldehydes (13a) as a white solid in 310 mg, 74% yield; mp: 135-136 C; 1H NMR (300 MHz, CDCl3): δ 7.12-7.19 (m, 2H), 7.57-7.73 (m, 6H), 7.78 (d, 2H, J = 8.3 Hz), 7.96 (d, 2H, J = 8.3 Hz), 10.06 (s, 1H); (ESI) MS: m/z 277 (M+H)+.
  • 5
  • [ 7343-33-1 ]
  • [ 156545-07-2 ]
  • 3-bromo-1-(3,5-difluorophenyl)-1,2,4-triazole [ No CAS ]
YieldReaction ConditionsOperation in experiment
50% With pyridine; copper diacetate; In dichloromethane; at 20℃; for 72h;Molecular sieve; Method 1: Diacetoxycopper (2.30 g, 12.7 mmol), 3,5-difluorophenyl-boronic acid (1.60 g, 10.1 mmol), <strong>[7343-33-1]3-bromo-1H-1,2,4-triazole</strong> (1.25 g, 8.4 mmol) and 4A molecular sieve (150mg) were mixed in DCM (50 mL), and pyridine (1.3 mL, 16.90 mmol) was added. The mixture was stined at RT under air for 3 days. LCMS showed that no starting material remained and desired product was formed. The reaction was filtered through a plug of Celite via suction and the solid was washed with additional DCM (200m1). The combined organic layer was washed with 0.1 N aqueous HC1 three times (50 ml x 3) and brine (200 ml). The organic layer was concentrated and purified on silica gel (120 g column, dry loading method on Celite) using 10-90percent EtOAc:Hexanes to afford 1.23 g (50percent) of desired product JW-lc. ?H NMR (400 MHz, DMSO-d6) oe 9.40 (s, 1H), 7.78 - 7.61 (m, 2H), 7.41 (tt, J = 9.3, 2.3 Hz, 1H) ppm. ESI-MS m/z calc. 258.95566, found 260.05 (M+1)+; Retention time: 0.8 minutes.
 

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