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CAS No. : | 214360-47-1 | MDL No. : | MFCD04039011 |
Formula : | C12H14BNO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | QHAYLPAKZXKQSE-UHFFFAOYSA-N |
M.W : | 215.06 | Pubchem ID : | 4198004 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302 | Packing Group: | N/A |
GHS Pictogram: |
* 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 |
---|---|---|
58% | In toluene; at 20℃; | To a solution of TMP (3.28 mL, 19.4 mmol) in anhydrous THF (20 mL), n-BuLi (1.6 M in hexanes, 11.7 mL, 18.8 mmol) was added at -10 C and the resulting mixture was stirred for 10 min. Then, B(Oi-Pr)3 (5.50 mL, 25 mmol) was added dropwise at -78 C and stirred for additional 5 min before benzonitrile 1 (1.28 mL, 12.5 mmol) was added via a syringe in a single portion and the reaction mixture was stirred at -78 C for 2 h. The solution was left to warm to rt while being stirred for 3 h and then quenched with saturated aqueous NH4Cl (60 mL). The resulting mixture was extracted with EtOAc (3 * 70 mL), the combined organic extracts were dried (Na2SO4) and concentrated in vacuo. The intermediate product 2 was dissolved in anhydrous Tol (50 mL) and 2,2-dimethyl-1,3-propandiol (1.57 g, 15 mmol) was added and then stirred overnight at rt. The organic phase was washed with H2O (3 * 30 mL) and the aqueous extracts were washed with CH2Cl2 (3 * 30 mL). The CH2Cl2-phase was washed with H2O (1 * 30 mL), combined with Tol extract, dried (Na2SO4) and concentrated in vacuo. Recrystallization of the crude product from heptane afforded pure 3 (58%, 2 steps) as a white crystalline solid: M.p. 109-111 C; ESI-MS (m/z): 216.64 [MH]; 1Eta NuMuR (400 MHz, CDCl3): delta 7.88 (d, 1Eta, J = 7.5 Hz), 7.68 (d, 1Eta, J = 7.5 Hz), 7.54 (td, 1Eta, J = 7.5 Hz, 1.0 Hz), 7.48 (td, 1Eta, J = 7.5 Hz, 1.0 Hz), 3.83 (s, 4H), 1.05 (s, 6H) ppm; 13C NMR (160 MHz, CDCl3): delta 135.07, 133.64, 131.44, 130.47, 119.63, 116.56, 72.49, 31.84, 21.83 ppm. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium carbonate;tetrakis(triphenylphosphine) palladium(0); In ethanol; water; toluene; at 100℃; for 4.0h; | A solution of 18 (2.12 g, 6.88 mmol), Pd(PPh3)4 (400 mg, 0.346 mmol, 5 mol %), <strong>[214360-47-1](2-cyanophenyl)boronic acid 2,2-dimethylpropanediol-1,3-cyclic ester</strong> (1.8 g, 8.37 mmol, 1.2 eq.) and K2CO3 (3.0 g, 27.49 mmol, 4 eq.) in toluene(20 ml)-EtOH(10 ml)-H2O(5 ml) mixture was heated in a sealed tube at 100 C. for 4 hr. The mixture was diluted with 150 ml H2O and extracted with 3×50 ml EtOAc. The combined organic layer was washed with brine, dried over MgSO4, filtered, concentrated and purified by chromatography to provide 23 (1.82 g) as a solid. 1H NMR (400 MHz, CDCl3) 8.66 (d, J=2.0, 1H), 7.86 (dd, J=8.0, 2.0, 1H), 7.78-7.75 (m, 1H), 7.68-7.64 (m, 1H), 7.50-7.45 (m, 3H), 4.08 (dq, J=8.0, 7.2, 4H), 3.46 (d, J=22, 2H), 1.26 (t, 6H). |
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