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 2207787Notes

Reaction equation

HRID 2207787 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 (20 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 (20 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-4764618e84a049738a69992bceaafef9
Source dataset
uspto-grants-2016_06
Patent number
US09376450B2

Reaction notes

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