Sodium Sulfate → (1R)-1-[(4-{[(2-Oxo-2H-chromen-7-yl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione

HRID 1943246Notes

Reaction equation

HRID 1943246 reaction equation
Cl.Cl.[NH2:3][CH:4]1[CH2:9][CH2:8][N:7]([CH2:10][C@H:11]2[N:21]3[C:22]4[N:13]([C:14](=[O:24])[CH:15]=[CH:16][C:17]=4[CH:18]=[CH:19][C:20]3=[O:23])[CH2:12]2)[CH2:6][CH2:5]1.[O:25]=[C:26]1[CH:35]=[CH:34][C:33]2[C:28](=[CH:29][C:30]([CH:36]=O)=[CH:31][CH:32]=2)[O:27]1.C([O-])(O)=O.[Na+].S([O-])([O-])(=O)=O.[Na+].[Na+].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCl.CO>[O:25]=[C:26]1[CH:35]=[CH:34][C:33]2[C:28](=[CH:29][C:30]([CH2:36][NH:3][CH:4]3[CH2:5][CH2:6][N:7]([CH2:10][C@H:11]4[N:21]5[C:22]6[N:13]([C:14](=[O:24])[CH:15]=[CH:16][C:17]=6[CH:18]=[CH:19][C:20]5=[O:23])[CH2:12]4)[CH2:8][CH2:9]3)=[CH:31][CH:32]=2)[O:27]1

Participants

8

Reactant 5

HCID 24436Sodium SulfateHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 120887742-Oxo-2H-chromene-7-carbaldehydeHCID 66658412(1R)-1-[(4-amino-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione dihydrochloride

Product 1

HCID 25100039(1R)-1-[(4-{[(2-Oxo-2H-chromen-7-yl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6344DichloromethaneSolvent

Procedure

To a 10 mL round-bottomed flask were added (1R)-1-[(4-amino-1-piperidinyl)methyl]-1,2-dihydro-4H,9H-imidazo[1,2,3-ij]-1,8-naphthyridine-4,9-dione dihydrochloride (for a preparation see Example 5A(j)) (80 mg, 0.266 mmol), 2-oxo-2H-chromene-7-carbaldehyde (for a synthesis see WO2008009700 Example 224) (46.4 mg, 0.266 mmol), and NaHCO3 (100 mg, 1.190 mmol) in dichloromethane (DCM) (4 ml) and methanol (1 ml) to give a brown solution. Sodium sulfate (200 mg, 1.408 mmol) was added and the reaction was allowed to stir at rt overnight. After 15 h sodium triacetoxyborohydride (113 mg, 0.533 mmol) was added and the reaction was allowed to stir at 25° C. under nitrogen for 4 h. The reaction mixture was adsorbed onto silica and purified using 0-10% MeOH/DCM (1% NH4OH) to give the title compound as a free base (30 mg, 0.064 mmol, 24.07% yield) as a tan solid. LCMS & 1H NMR consistant with desired product.

Workup

  1. customto give a brown solution
  2. stirringto stir at 25° C. under nitrogen for 4 h
  3. custompurified

Sources & evidence

ORD record
ord-a9c7073085c24be889c2f25203cdf430
Source dataset
uspto-grants-2013_03
Patent number
US08389524B2

Reaction notes

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