Sodium Bicarbonate → HCID 57815264, compound

HRID 1510800Notes

Reaction equation

HRID 1510800 reaction equation
[Br:1][C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[CH:7][C:8](=[O:15])[N:9]2[CH2:12][CH:13]=O)=[N:4][CH:3]=1.[O:16]1[C:25]2[CH:24]=[C:23]([CH2:26][N:27]([CH:35]3[CH2:40][CH2:39][NH:38][CH2:37][CH2:36]3)[C:28](=[O:34])[O:29][C:30]([CH3:33])([CH3:32])[CH3:31])[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+]>C(Cl)(Cl)Cl.C(O)(=O)C>[Br:1][C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[CH:7][C:8](=[O:15])[N:9]2[CH2:12][CH2:13][N:38]2[CH2:37][CH2:36][CH:35]([N:27]([CH2:26][C:23]3[N:22]=[CH:21][C:20]4[O:19][CH2:18][CH2:17][O:16][C:25]=4[CH:24]=3)[C:28](=[O:34])[O:29][C:30]([CH3:32])([CH3:33])[CH3:31])[CH2:40][CH2:39]2)=[N:4][CH:3]=1

Participants

7

Reactant 4

HCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 57815314HCID 57815314, compoundHCID 578154611,1-Dimethylethyl (2,3-dihydro[1,4]dioxino[2,3-c]pyridin-7-ylmethyl)-4-piperidinylcarbamate

Product 1

HCID 57815264HCID 57815264, compoundYield 71.5%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 6212ChloroformSolvent

Procedure

To 7.00 g of (7-bromo-2-oxo-1,5-naphthyridin-1(2H)-yl)acetaldehyde, a solution of 10.07 g of tert-butyl (2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)(piperidin-4-yl)carbamate in 140 mL of chloroform and 1.57 g of acetic acid were added, and the mixture was stirred at room temperature for 19 hours, then, 8.77 g of sodium triacetoxyborohydride was added thereto and the mixture was stirred for 2 hours. To the reaction mixture, 140 mL of a saturated aqueous sodium hydrogen carbonate solution was added, the organic layer was separated, then washed with a saturated aqueous sodium chloride solution and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The resultant residue was purified by silica gel column chromatography using silica gel; Chromatorex-NH made by Fuji Silysia Chemical Ltd., and gradient elution with hexane:ethyl acetate=50:50 to 5:95, and then recrystallized in 24 mL of ethanol to obtain 11.26 g of tert-butyl (1-(2-(7-bromo-2-oxo-1,5-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)(2,3-dihydro(1,4)dioxino(2,3-c)pyridin-7-ylmethyl)carbamate as a white solid.

Workup

  1. stirringthe mixture was stirred for 2 hours
  2. customthe organic layer was separated
  3. washwashed with a saturated aqueous sodium chloride solution
  4. dry with materialdried over anhydrous magnesium sulfate
  5. distillationthe solvent was distilled off under reduced pressure
  6. customThe resultant residue was purified by silica gel column chromatography
  7. wash, and gradient elution with hexane
  8. customethyl acetate=50:50 to 5:95, and then recrystallized in 24 mL of ethanol

Sources & evidence

ORD record
ord-a4ce1c4835ac40e59f6d09945e3fdf90
Source dataset
uspto-grants-2012_07
Patent number
US08211908B2

Reaction notes

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