Sodium Bicarbonate → tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(4-methoxycarbonyl-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate

HRID 2193194Notes

Reaction equation

HRID 2193194 reaction equation
[O:1]=[C:2]1[CH:11]=[C:10]([C:12]([O:14][CH3:15])=[O:13])[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[N:3]1[CH2:16][CH:17]=O.[O:19]1[C:24]2[CH:25]=[CH:26][C:27]([CH2:29][N:30]([CH:38]3[CH2:43][CH2:42][NH:41][CH2:40][CH2:39]3)[C:31](=[O:37])[O:32][C:33]([CH3:36])([CH3:35])[CH3:34])=[CH:28][C:23]=2[O:22][CH2:21][CH2:20]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(=O)([O-])O.[Na+]>C(O)(=O)C.ClCCl>[C:33]([O:32][C:31]([N:30]([CH2:29][C:27]1[CH:26]=[CH:25][C:24]2[O:19][CH2:20][CH2:21][O:22][C:23]=2[CH:28]=1)[CH:38]1[CH2:43][CH2:42][N:41]([CH2:17][CH2:16][N:3]2[C:4]3[C:9](=[CH:8][CH:7]=[CH:6][CH:5]=3)[C:10]([C:12]([O:14][CH3:15])=[O:13])=[CH:11][C:2]2=[O:1])[CH2:40][CH2:39]1)=[O:37])([CH3:36])([CH3:34])[CH3:35]

Participants

7

Reactant 4

HCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 57815320Tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(piperidin-4-yl)carbamateHCID 59397852HCID 59397852, compound

Product 1

HCID 59397905tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(4-methoxycarbonyl-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamateYield 68.5%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 6344DichloromethaneSolvent

Procedure

To 24 mL of dichloromethane suspension containing 0.8 g of methyl 2-oxo-1-(2-oxoethyl)-1,2-dihydroquinoline-4-carboxylate and 1.1 g of tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(piperidin-4-yl)carbamate, 0.24 mL of acetic acid was added, at room temperature and stirred at room temperature for 1 hour. To the reaction mixture, 1.0 g of sodium triacetoxyborohydride was added, and stirred at room temperature for 1 hour. Aqueous saturated sodium hydrogen carbonate solution was added, the organic layer was separated, and the aqueous layer was extracted with dichloromethane. The organic layer and extracts were combined, washed sequentially with water and aqueous saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The residue thus obtained was purified by silica gel column chromatography [eluent; ethyl acetate], to give 1.25 g of methyl 1-(2-(4-((tert-butoxycarbonyl)(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-2-oxo-1,2-dihydroquinoline-4-carboxylate as a slight yellow oil.

Workup

  1. additionwas added, at room temperature
  2. stirringstirred at room temperature for 1 hour
  3. customthe organic layer was separated
  4. extractionthe aqueous layer was extracted with dichloromethane
  5. washwashed sequentially with water and aqueous saturated sodium chloride solution
  6. dry with materialdried over anhydrous magnesium sulfate
  7. customthe solvent was removed under reduced pressure
  8. customThe residue thus obtained
  9. customwas purified by silica gel column chromatography [eluent; ethyl acetate]

Sources & evidence

ORD record
ord-d693a6d80d4941a2a502119139cb55c6
Source dataset
uspto-grants-2012_12
Patent number
US08329694B2

Reaction notes

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