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CAS No. : | 76-09-5 | MDL No. : | MFCD00004462 |
Formula : | C6H14O2 | Boiling Point : | - |
Linear Structure Formula : | ((CH3)2(OH)C)2 | InChI Key : | IVDFJHOHABJVEH-UHFFFAOYSA-N |
M.W : | 118.17 | Pubchem ID : | 6425 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P501-P270-P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313-P301+P312+P330 | UN#: | N/A |
Hazard Statements: | H302-H315-H319 | 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 |
---|---|---|
81% | Stage #1: at 60℃; for 4 h; Stage #2: With tetrabutyl ammonium fluoride In tetrahydrofuran; 1,4-dioxane; water at 60℃; for 4 h; |
To a 10 mL reaction tube equipped with a magnet was added 56 mg (0.4 mmol) of 2-fluorobenzeneboronic acid, 0.6 mL (1.2 mmol) of trimethylsilyl diazomethane (2 M n-hexane solution), 1 mL of toluene was added to the system, The rubber stopper was stoppered and reacted on an electromagnetic heating stirrer at 60 ° C for 4 hours.(0.4 mmol) of tetramethylammonium fluoride (1 M tetrahydrofuran solution) and 200 uL of water were added to an electromagnetic heating stirrer at 60 ° C On the reaction for 4 hours.After completion of the reaction, the organic solvent was removed by a rotary evaporator and purified by column chromatography2-fluorobenzyl boronic acid pinacol ester, its structure is as follows:The compound was a colorless liquid in a yield of 81percent and its NMR data was as follows: |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With magnesium sulfate In toluene at 20℃; for 15 h; | 34). Synthesis of 2-chloro-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-pyrimidine; To a solution of 5-bromo-2-chloro-pyrimidine (10 mmol, 1.93 g) and triisopropyl borate (12 mmol, 2.8 ml.) in toluene (16 ml) and THF (4 mi_) is added n-buty. lithium \\r, hexane (1.58 M, 12 mmol, 7.6 mL) dropwise at -78 0C over 45 min and stirred at -78 0C for 1 hour. The mixture is warmed to -20 0C, then added aq. hydrogen chloride (1M, 20 mL). The mixture is warmed to room temperature. The precipitate is collected and washed with hexane to give a colorless powder (808 mg, 51percent). A mixture of the powder (3.63 mmol, 575 mg), pinacol (3.81 mmol, 450 mg) and MgSO4 (18.15 mmol, 2.2 g) in toluene (10 mL) is <n="192"/>stirred at room temperature for 15 hour. The mixture is filtrated and the solution is concentrated under reduced pressure. The resultant solid is washed with water to give 2- chloro-5-(4,4,5,5-tetramethyl-[1 ,3,2]dioxaborolan-2-yl)-pyrimidine (875 mg, quant); ESI-MS m/z: 159 [M+1-pinacol]\\ Retention time 1.75 min (condition A). |
100% | With magnesium sulfate In toluene at 20℃; for 15 h; | Example 14; 1) Synthesis of 2-chloro-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-pyrimidine To a solution of 5-bromo-2-chloro-pyrimidine (10 mmol, 1.93 g) and triisopropyl borate (12 mmol, 2.8 mL) in toluene (16 mL) and THF (4 mL) is added n-butyl lithium in hexane (1.58 M, 12 mmol, 7.6 mL) dropwise at -78° C. over 45 min and stirred at -78° C. for 1 hour. The mixture is warmed to -20° C., then added aqueous 1 M HCl (20 mL). The mixture is warmed to room temperature. The precipitate is collected and washed with hexane to give a colorless powder (808 mg, 51percent). A mixture of the powder (3.63 mmol, 575 mg), pinacol (3.81 mmol, 450 mg) and MgSO4 (18.15 mmol, 2.2 g) in toluene (10 mL) is stirred at room temperature for 15 hour. The mixture is filtrated and the solution is concentrated under reduced pressure. The resultant solid is washed with water to give 2-chloro-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-pyrimidine (875 mg, quant); ESI-MS m/z: 159 [M+1-pinacol]+, Retention time 1.75 min (condition A). |
[ 2451-01-6 ]
rel-(1s,4s)-4-(2-Hydroxypropan-2-yl)-1-methylcyclohexanol hydrate
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