Sodium Bicarbonate → Tert-butyl 3-(((2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)amino)methyl)piperidine-1-carboxylate

HRID 1510678Notes

Reaction equation

HRID 1510678 reaction equation
[NH2:1][CH2:2][CH:3]1[CH2:8][CH2:7][CH2:6][N:5]([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:4]1.[O:16]1[C:25]2[CH:24]=[C:23]([CH:26]=O)[N:22]=[CH:21][C:20]=2[O:19][CH2:18][CH2:17]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(=O)([O-])O.[Na+]>ClCCl.C(Cl)(Cl)Cl.C(O)(=O)C>[O:16]1[C:25]2[CH:24]=[C:23]([CH2:26][NH:1][CH2:2][CH:3]3[CH2:8][CH2:7][CH2:6][N:5]([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:4]3)[N:22]=[CH:21][C:20]=2[O:19][CH2:18][CH2:17]1

Participants

8

Reactant 4

HCID 516892Sodium BicarbonateHCID 27564831-Boc-3-(aminomethyl)piperidineHCID 5049666Sodium triacetoxyborohydrideHCID 218736682,3-Dihydro[1,4]dioxino[2,3-c]pyridine-7-carbaldehyde

Product 1

HCID 57815295Tert-butyl 3-(((2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)amino)methyl)piperidine-1-carboxylate

Reagents, catalysts & solvents 3

HCID 176Acetic AcidSolventHCID 6212ChloroformSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of 0.65 g of tert-butyl 3-(aminomethyl)piperidine-1-carboxylate in 5 mL of dichloromethane, 0.50 g of (2,3-dihydro(1,4)dioxino(2,3-c)pyridine-7-carbaldehyde and 0.17 mL of acetic acid were added. Subsequently, 0.96 g of sodium triacetoxyborohydride was added thereto and the mixture was stirred at room temperature for 1 hour 15 minutes. The reaction mixture was charged with chloroform and adjusted to pH 8.6 with a saturated aqueous sodium hydrogen carbonate solution and a 20% aqueous sodium hydroxide solution, the organic layer was separated, and the aqueous layer was extracted with chloroform. The organic layer and the extract were combined, the resultant solution was washed with water and a saturated aqueous sodium chloride solution and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure to obtain 1.3 g of tert-butyl 3-(((2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)amino)methyl)piperidine-1-carboxylate as a yellow oily substance.

Workup

  1. customa 20% aqueous sodium hydroxide solution, the organic layer was separated
  2. extractionthe aqueous layer was extracted with chloroform
  3. washthe resultant solution was washed with water
  4. dry with materiala saturated aqueous sodium chloride solution and dried over anhydrous magnesium sulfate
  5. distillationthe solvent was distilled off under reduced pressure

Sources & evidence

ORD record
ord-e0bc39d3d4e24994ba7b6b03a858282a
Source dataset
uspto-grants-2012_07
Patent number
US08211908B2

Reaction notes

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