Structure of 101-55-3
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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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Transition-Metal-Free Borylation of Aryl Bromide Using a Simple Diboron Source
Lim, Taeho ; Ryoo, Jeong Yup ; Han, Min Su ;
Abstract: In this study, we developed a simple transition-metal-free borylation reaction of aryl bromides. Bis-boronic acid (BBA), was used, and the borylation reaction was performed using a simple procedure at a mild temperature. Under mild conditions, aryl bromides were converted to arylboronic acids directly without any deprotection steps and purified by conversion to trifluoroborate salts. The functional group tolerance was considerably high. The mechanism study suggested that this borylation reaction proceeds via a radical pathway.
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CAS No. : | 101-55-3 |
Formula : | C12H9BrO |
M.W : | 249.10 |
SMILES Code : | BrC1=CC=C(OC2=CC=CC=C2)C=C1 |
MDL No. : | MFCD00000094 |
InChI Key : | JDUYPUMQALQRCN-UHFFFAOYSA-N |
Pubchem ID : | 7565 |
GHS Pictogram: |
![]() ![]() ![]() |
Signal Word: | Danger |
Hazard Statements: | H302-H315-H318-H335-H410 |
Precautionary Statements: | P261-P264-P270-P271-P280-P302+P352-P304+P340-P305+P351+P338-P310-P330-P362+P364-P403+P233-P501 |
Class: | 9 |
UN#: | 3077 |
Packing Group: | Ⅲ |
Num. heavy atoms | 14 |
Num. arom. heavy atoms | 12 |
Fraction Csp3 | 0.0 |
Num. rotatable bonds | 2 |
Num. H-bond acceptors | 1.0 |
Num. H-bond donors | 0.0 |
Molar Refractivity | 60.66 |
TPSA ? Topological Polar Surface Area: Calculated from |
9.23 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
2.92 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
4.3 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
4.24 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
4.01 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
3.73 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
3.84 |
Log S (ESOL):? ESOL: Topological method implemented from |
-4.6 |
Solubility | 0.00632 mg/ml ; 0.0000254 mol/l |
Class? Solubility class: Log S scale |
Moderately soluble |
Log S (Ali)? Ali: Topological method implemented from |
-4.21 |
Solubility | 0.0155 mg/ml ; 0.0000621 mol/l |
Class? Solubility class: Log S scale |
Moderately soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-5.51 |
Solubility | 0.000766 mg/ml ; 0.00000308 mol/l |
Class? Solubility class: Log S scale |
Moderately 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) |
No |
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 |
-4.77 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 |
1.0 |
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<2.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.81 |
* 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 |
---|---|---|
[00432] In a reaction tube under nitrogen, a mixture of PdCl2(dppf)CH2Cl2 (22 mg; 0.027 mmol) and triethylamine (0.36 ml; 2.58 mmol) in dioxane (4 ml; dried over 4 ? sieves) was sealed and stirred at 80 C. overnight (18 h). After cooling to room temperature, HB(pin) (0.19 ml;, 1.31 mmol) and 4-bromodiphenyl ether (216 mg; 0.865 mmol) were added and the reaction mixture was stirred at 80 C. GC analysis after 18 h showed a peak at 13.84 mins which was identified by GC/MS as the desired compound. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
72% | With n-butyllithium; In tetrahydrofuran; at -78 - -40℃; for 18h;Inert atmosphere; | 4-bromodiphenyl ether(6.2g, 25.0mmol) Isopropanol pinacol borate (10.3 mL, 50 mmol)Soluble in dry tetrahydrofuran,Cooled to -78C under nitrogen protection.n-Butyllithium (2.5M, 18 mL, 45 mmol) was added dropwise,After completion of the addition, the mixture was stirred for 6 hours and slowly warmed to -40C for 12 hours.The reaction was added to saturated ammonium chloride solution and extracted three times with ethyl acetate.The organic phases were combined and dried over anhydrous sodium sulfate.It was evaporated to dryness by rotary evaporation and purified by column to give 5.4 g of the target compound in a yield of 72%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
76% | General procedure: To a solution of 4-bromobiphenyl 1a (3.0 mmol, 699.3 mg) in THF (3.0 mL) was added n-BuLi (4.5 mmol, 1.55 M in hexane, 2.87 mL) at 50 C. The obtained mixture was stirred for 30 min at 50 C under an argon atmosphere. Pivalonitrile (6.0 mmol, 498.8 mg) in THF (2.0 mL) was added to the mixture at 50 C and the obtained mixture was stirred for 30 min in the temperature range of 50 C to room temperature. MeOH (2.0 mL) was added to the mixture. Then, I2 (12.0 mmol, 3045.6 mg) and K2CO3 (12.0 mmol, 1658.4 mg) were added to the mixture at room temperature, and the obtained mixture was stirred for 6 h at 70 C. Sat. aq. Na2SO3 solution (20.0 mL) was added to the reaction mixture, and the product was extracted with AcOEt (10.0 mL x 3). The organic layer was dried over Na2SO4. After filtration and removal of the solvent, the residue was purified by silica-gel column chromatography (chloroform: n-hexane 1:1) to give 4-cyanobiphenyl 2a (451.6 mg, 84%). |
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