| Identification | Back Directory | [Name]
1-(2-Methoxyethyl)-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole | [CAS]
847818-71-7 | [Synonyms]
Pinacol 1-(2-methoxyethyl)-4-pyrazolyl-boronate
1-(2-Methoxyethyl)pyrazole-4-boronic Acid Pinacol Ester
1-(2-Methoxyethyl)-1H-pyrazole-4-boronic acid, pinacol ester
(1-(2-METHOXYETHYL)-1H-PYRAZOL-4-YL)BORONIC ACID PINACOL ESTER
1-(2-methoxyethyl)-4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole
1-(2-METHOXYETHYL)-4-(4,4,5,5-TETRAMETHYL-1,3,2-DIOXABOROLAN-2-YL)PYRAZOLE
1-(2-Methoxyethyl)-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole
2-[1-(2-Methoxyethyl)-1H-pyrazol-4-yl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
1H-Pyrazole, 1-(2-methoxyethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-
1-(2-Methoxyethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole, 2-[1-(2-Methoxyethyl)-1H-pyrazol-4-yl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
1-(2-Methoxyethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole, Methyl 2-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]ethyl ether | [Molecular Formula]
C12H21BN2O3 | [MDL Number]
MFCD12405649 | [MOL File]
847818-71-7.mol | [Molecular Weight]
252.118 |
| Chemical Properties | Back Directory | [Melting point ]
54 °C | [Boiling point ]
356.4±22.0 °C(Predicted) | [density ]
1.07±0.1 g/cm3(Predicted) | [storage temp. ]
Inert atmosphere,Store in freezer, under -20°C | [form ]
powder to crystal | [pka]
1.87±0.10(Predicted) | [color ]
White to Orange to Green |
| Hazard Information | Back Directory | [Synthesis]
The reaction was carried out with 4-pyrazoleboronic acid pinacol ester (1.94 g, 10 mmol) and 2-bromoethyl methyl ether (1.68 g, 12 mmol) in a microwave reactor with stirring at 160 °C for 1 hour. Potassium carbonate (2.76 g, 20 mmol) and N,N-dimethylformamide (16 mL) were added as solvents to the reaction system. After completion of the reaction, the reaction mixture was concentrated and purified by silica gel column chromatography (eluent: 30% ethyl acetate/petroleum ether) to afford 1-(2-methoxyethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (2.2 g, 90% yield) as a yellow oil. The product was characterized by 1H NMR (400 MHz, CDCl3): δ 1.32 (12H, s), 3.32 (3H, s), 3.75 (2H, t, J = 5.2 Hz), 4.30 (2H, t, J = 5.2 Hz), 7.77 (1H, s), 7.79 (1H, s). Mass spectral analysis: [M + H]+ m/z calculated value 253.2, measured value 253.2. | [References]
[1] Patent: WO2014/151106, 2014, A1. Location in patent: Paragraph 00179
[2] Patent: WO2011/51342, 2011, A1. Location in patent: Page/Page column 95
[3] Patent: US2011/269752, 2011, A1. Location in patent: Page/Page column 42
[4] Patent: WO2017/178416, 2017, A1. Location in patent: Page/Page column 115
[5] Patent: WO2014/37751, 2014, A1. Location in patent: Paragraph 00416-00418 |
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