Sodium Bicarbonate → Methyl 1-(2-(1-(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)piperidin-4-ylamino)ethyl)-7-methoxy-2-oxo-1,2-dihydroquinoline-4-carboxylate

HRID 39870Notes

Reaction equation

HRID 39870 reaction equation
[CH3:1][O:2][C:3]1[CH:12]=[C:11]2[C:6]([C:7]([C:17]([O:19][CH3:20])=[O:18])=[CH:8][C:9](=[O:16])[N:10]2[CH2:13][CH:14]=O)=[CH:5][CH:4]=1.[O:21]1[C:26]2[CH:27]=[CH:28][C:29]([CH2:31][N:32]3[CH2:37][CH2:36][CH:35]([NH2:38])[CH2:34][CH2:33]3)=[CH:30][C:25]=2[O:24][CH2:23][CH2:22]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(=O)([O-])O.[Na+]>C(O)(=O)C.C(Cl)(Cl)Cl>[O:21]1[C:26]2[CH:27]=[CH:28][C:29]([CH2:31][N:32]3[CH2:37][CH2:36][CH:35]([NH:38][CH2:14][CH2:13][N:10]4[C:11]5[C:6](=[CH:5][CH:4]=[C:3]([O:2][CH3:1])[CH:12]=5)[C:7]([C:17]([O:19][CH3:20])=[O:18])=[CH:8][C:9]4=[O:16])[CH2:34][CH2:33]3)=[CH:30][C:25]=2[O:24][CH2:23][CH2:22]1

Participants

7

Reactant 4

HCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 392561291-(2,3-Dihydro-1,4-benzodioxin-6-ylmethyl)piperidin-4-ylamineHCID 59397992Methyl 7-methoxy-2-oxo-1-(2-oxoethyl)-1,2-dihydroquinoline-4-carboxylate

Product 1

HCID 59398439Methyl 1-(2-(1-(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)piperidin-4-ylamino)ethyl)-7-methoxy-2-oxo-1,2-dihydroquinoline-4-carboxylateYield 70.5%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 6212ChloroformSolvent

Procedure

To 10 mL of a chloroform solution containing 111 mg of methyl 7-methoxy-2-oxo-1-(2-oxoethyl)-1,2-dihydroquinoline-4-carboxylate and 93 mg of 1-(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)piperidin-4-ylamine, 23 μL of acetic acid was added and stirred at room temperature for 1 hour. To the reaction mixture, 132 mg of sodium triacetoxyborohydride was added and stirred for 0.5 hours. Aqueous saturated sodium hydrogen carbonate solution was added and the organic layer was separated. The organic layer was washed with 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 [Silica Gel; Fuji Silysia Chemical Ltd., Chromatorex-NH, eluent; ethyl acetate:hexane=3:1], to give 134 mg of methyl 1-(2-(1-(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)piperidin-4-ylamino)ethyl)-7-methoxy-2-oxo-1,2-dihydroquinoline-4-carboxylate.

Workup

  1. additionwas added
  2. stirringstirred for 0.5 hours
  3. customthe organic layer was separated
  4. washThe organic layer was washed with aqueous saturated sodium chloride solution
  5. dry with materialdried over anhydrous magnesium sulfate
  6. customthe solvent was removed under reduced pressure
  7. customThe residue thus obtained
  8. customwas purified by silica gel column chromatography [Silica Gel; Fuji Silysia Chemical Ltd., Chromatorex-NH, eluent; ethyl acetate:hexane=3:1]

Sources & evidence

ORD record
ord-4b272ffb8b5043d58818815140ec4612
Source dataset
uspto-grants-2013_09
Patent number
US08524738B2

Reaction notes

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