Dichloromethane → (2R)-2-[(4-{[(7-Fluoro-2,3-dihydro-1,4-benzodioxin-6-yl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione hydrochloride

HRID 1943210Notes

Reaction equation

HRID 1943210 reaction equation
[NH2:1][CH:2]1[CH2:7][CH2:6][N:5]([CH2:8][C@H:9]2[N:19]3[C:20]4[N:11]([C:12](=[O:22])[CH:13]=[CH:14][C:15]=4[N:16]=[CH:17][C:18]3=[O:21])[CH2:10]2)[CH2:4][CH2:3]1.[F:23][C:24]1[C:25]([CH:34]=O)=[CH:26][C:27]2[O:32][CH2:31][CH2:30][O:29][C:28]=2[CH:33]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(=O)([O-])O.[Na+].[Cl:55]CCl>CO.C(Cl)(Cl)Cl>[ClH:55].[F:23][C:24]1[C:25]([CH2:34][NH:1][CH:2]2[CH2:7][CH2:6][N:5]([CH2:8][C@H:9]3[N:19]4[C:20]5[N:11]([C:12](=[O:22])[CH:13]=[CH:14][C:15]=5[N:16]=[CH:17][C:18]4=[O:21])[CH2:10]3)[CH2:4][CH2:3]2)=[CH:26][C:27]2[O:32][CH2:31][CH2:30][O:29][C:28]=2[CH:33]=1

Participants

8

Reactant 5

HCID 6344DichloromethaneHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 146448837-Fluoro-2,3-dihydrobenzo[b][1,4]dioxine-6-carbaldehydeHCID 58200877(2R)-2-[(4-Amino-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione

Product 1

HCID 68597971(2R)-2-[(4-{[(7-Fluoro-2,3-dihydro-1,4-benzodioxin-6-yl)methyl]amino}-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione hydrochloride

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6212ChloroformSolvent

Procedure

(2R)-2-[(4-Amino-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione (50 mg, 0.166 mmol) (for a preparation see Example 16(j)) and 7-fluoro-2,3-dihydro-benzo[1,4]dioxin-6-carboxaldehyde (28 mg, 0.926 eq.) (for a synthesis see WO2002056882, Example 23(a)) were stirred in 9:1 v:v chloroform:methanol (1 ml) for 2.5 hours. Sodium triacetoxyborohydride (105 mg, 3.000 eq.) was then added in one portion and the mixture was stirred vigorously at room temperature for 30 min. Saturated aqueous sodium hydrogen carbonate (0.5 ml) was then added, followed by dichloromethane (10 ml) and the mixture was stirred vigorously at room temperature for 10 min and the phases were separated (hydrophobic frit). The organic phase was evaporated under reduced pressure and the crude product was purified by column chromatography on silica (eluted with 0-12% (2M NH3 in MeOH) in DCM. Appropriate fractions were combined and evaporated under reduced pressure to give the free base of the title compound as a white solid (48 mg).

Workup

  1. stirringthe mixture was stirred vigorously at room temperature for 30 min
  2. stirringthe mixture was stirred vigorously at room temperature for 10 min
  3. customthe phases were separated (hydrophobic frit)
  4. customThe organic phase was evaporated under reduced pressure
  5. customthe crude product was purified by column chromatography on silica (
  6. washeluted with 0-12% (2M NH3 in MeOH) in DCM
  7. customevaporated under reduced pressure

Sources & evidence

ORD record
ord-a9933b8db86a40099ae6ef86bb3d73d7
Source dataset
uspto-grants-2013_03
Patent number
US08389524B2

Reaction notes

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