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CAS No. : | 1131912-76-9 | MDL No. : | MFCD11506065 |
Formula : | C11H21BO3 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | NLSMOSUUBUCSPL-UHFFFAOYSA-N |
M.W : | 212.09 | Pubchem ID : | 42614649 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
GHS Pictogram: |
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* 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 |
---|---|---|
32% | With triethylamine; for 1h; | General procedure: General Procedure B: NHPI ester (1.0 eq., 0.13 mmol) and B2cat2 (40 mg, 1.25 eq., 0.16 mmol) were carefully weighed into a flame-dried 7 mL vial containing a small magnetic stiffer bar. DMAc (1.3 mL, 0.1 M) was added and then the headspace of thevial was purged with a gentle stream of argon for approximately 10 seconds. The vial was tightly sealed and stirred under blue LED iffadiation for 14 h. Pinacol (63 mg, 0.53 mmol, 4 eq.) was dissolved in Et3N (0.45 mL), added to the reaction mixture and stuffed for 1 h. For workup, the reaction mixture was transfeffed into a vial containing EtOAc (15 mL), H20 (3 mL), NH4Cl (saturated aqueous solution, 3 mL). After vigorouslyshaking and allowing the two layers to separate, the top organic layer was carefully removed with a pipette. This was repeated twice more with EtOAc delta mL). The organic layers were combined and concentrated under reduced pressure. The crude residue was directly purified using a short silica gel column to yield the desired boronic ester. Alternative workup: The crude reaction mixture was diluted with Et20 (10 mL) andwashed with NaOH (aqueous, 0.10 M, 6 mL), and then the aqueous layer was extracted with Et20 (10 mL). The combined organic layers were washed with NaOH (aqueous,0.10 M, 6 mL) and water (6 mL), then dried over MgSO4, filtered and concentrated under reduced pressure to yield the desired boronic ester. |
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