Acetyl chloride → 1-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydropyridin-1(2H)-yl)ethan-1-one

HRID 454891Notes

Reaction equation

HRID 454891 reaction equation
Cl.[CH3:2][C:3]1([CH3:16])[C:7]([CH3:9])([CH3:8])[O:6][B:5]([C:10]2[CH2:11][CH2:12][NH:13][CH2:14][CH:15]=2)[O:4]1.CCN(CC)CC.[C:24](Cl)(=[O:26])[CH3:25]>C(Cl)Cl>[CH3:9][C:7]1([CH3:8])[C:3]([CH3:16])([CH3:2])[O:4][B:5]([C:10]2[CH2:11][CH2:12][N:13]([C:24](=[O:26])[CH3:25])[CH2:14][CH:15]=2)[O:6]1

Participants

5

Reactant 3

HCID 6367Acetyl chlorideHCID 8471TriethylamineHCID 497610841,2,3,6-Tetrahydropyridine-4-boronic acid, pinacol ester hydrochloride

Product 1

HCID 567376781-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydropyridin-1(2H)-yl)ethan-1-oneYield 108%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine hydrochloride (2.9 g, 11.8 mmol) in DCM (30 mL) were added Et3N (3.6 g, 35.4 mmol) and acetyl chloride (AcCl) (932 mg, 11.8 mmol). The reaction mixture was stirred at room temperature for 1 hour, then diluted with DCM (20 mL), washed with H2O (2.0 mL). The organic layer was washed with brine (20 mL), dried over Na2SO4, and filtered, evaporated to give the crude product (3.2 g, crude). ESI-MS (M+1): 252 calc. for C13H22BNO3 251.

Workup

  1. washwashed with H2O (2.0 mL)
  2. washThe organic layer was washed with brine (20 mL)
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. customevaporated

Sources & evidence

ORD record
ord-b14a8dd6fb85405eab000bd592774e7d
Source dataset
uspto-grants-2013_07
Patent number
US08497265B2

Reaction notes

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