Acetic Acid → tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(2-oxo-1,8-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate

HRID 385624Notes

Reaction equation

HRID 385624 reaction equation
[O:1]=[C:2]1[CH:11]=[CH:10][C:9]2[C:4](=[N:5][CH:6]=[CH:7][CH:8]=2)[N:3]1[CH2:12][CH:13]=O.[O:15]1[C:20]2[CH:21]=[CH:22][C:23]([CH2:25][N:26]([CH:34]3[CH2:39][CH2:38][NH:37][CH2:36][CH2:35]3)[C:27](=[O:33])[O:28][C:29]([CH3:32])([CH3:31])[CH3:30])=[CH:24][C:19]=2[O:18][CH2:17][CH2:16]1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCl.O>[O:15]1[C:20]2[CH:21]=[CH:22][C:23]([CH2:25][N:26]([CH:34]3[CH2:39][CH2:38][N:37]([CH2:13][CH2:12][N:3]4[C:4]5[C:9](=[CH:8][CH:7]=[CH:6][N:5]=5)[CH:10]=[CH:11][C:2]4=[O:1])[CH2:36][CH2:35]3)[C:27](=[O:33])[O:28][C:29]([CH3:32])([CH3:30])[CH3:31])=[CH:24][C:19]=2[O:18][CH2:17][CH2:16]1

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 5049666Sodium triacetoxyborohydrideHCID 57815222(2-oxo-1,8-naphthyridin-1(2H)-yl)acetaldehydeHCID 57815320Tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(piperidin-4-yl)carbamate

Product 1

HCID 57815442tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(2-oxo-1,8-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)carbamateYield 67.5%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of 0.75 g of (2-oxo-1,8-naphthyridin-1(2H)-yl)acetaldehyde in 40 mL of dichloromethane, 1.4 g of tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(piperidin-4-yl)carbamate, 0.23 mL of acetic acid and 1.3 g of sodium triacetoxyborohydride were added, and the mixture was stirred at room temperature for 2 hours. Thereto were added water, a saturated aqueous sodium hydrogen carbonate solution and chloroform, 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 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 an eluent of chloroform:methanol=200:3 to obtain 1.4 g of tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(2-oxo-1,8-naphthyridin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate as a white foam.

Workup

  1. customa saturated aqueous sodium hydrogen carbonate solution and chloroform, the organic layer was separated
  2. extractionthe aqueous layer was extracted with chloroform
  3. washthe resultant solution was washed 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

Sources & evidence

ORD record
ord-489fb62499764b19a49915ee182ad933
Source dataset
uspto-grants-2013_02
Patent number
US08367831B2

Reaction notes

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