| Identification | Back Directory | [Name]
1-Cyclobutyl-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole | [CAS]
1002309-48-9 | [Synonyms]
1-Cyclobutyl-1H-pyrazole-...
1-Cyclodecen-1-yl-boronic acid pinacol ester
1-Cyclobutyl-1H-pyrazole-4-boronic acid pinacol ester
1-Cyclobutyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)
1-cyclobutyl-4-(tetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole
1-cyclobutyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrazole
1-Cyclobutyl-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole
1H-Pyrazole, 1-cyclobutyl-4-(4,4,5,5-tetraMethyl-1,3,2-dioxaborolan-2-yl)- | [Molecular Formula]
C13H21BN2O2 | [MDL Number]
MFCD16659010 | [MOL File]
1002309-48-9.mol | [Molecular Weight]
248.13 |
| Chemical Properties | Back Directory | [Boiling point ]
370.2±15.0 °C(Predicted) | [density ]
1.14±0.1 g/cm3(Predicted) | [storage temp. ]
Keep in dark place,Sealed in dry,Room Temperature | [form ]
solid | [pka]
3.33±0.12(Predicted) | [color ]
Off-white | [InChIKey]
OBCTWWFLJFCNPC-UHFFFAOYSA-N |
| Hazard Information | Back Directory | [Synthesis]
4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (300 mg, 1.55 mmol) was dissolved in N,N-dimethylformamide (DMF, 5 mL) at 0 °C and under argon protection. Sodium hydride (60% oil solution, 40.8 mg, 1.70 mmol) was added in batches, followed by stirring the reaction mixture for 20 min at room temperature. A DMF (1 mL) solution of bromocyclobutane (209 mg, 1.55 mmol) was added and stirring was continued for 2 hours at room temperature. Upon completion of the reaction, the reaction was quenched with saturated aqueous ammonium chloride solution and then extracted three times with ethyl acetate (EtOAc). The organic phases were combined, washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated. Purification by silica gel column chromatography afforded the target product N-cyclobutyl-pyrazole-4-boronic acid pinacol ester (20A, 40 mg, 5.21% yield). Mass spectrum (ESI): m/z 249.0 ([M+H]+). | [References]
[1] Patent: WO2017/160632, 2017, A1. Location in patent: Page/Page column 96
[2] Patent: WO2018/114786, 2018, A1. Location in patent: Page/Page column 152-153 |
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