Triethylamine → Ethyl 4'-[(1R)-1-[[(6,7-dichloro-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)acetyl](methyl)amino]-2-(4-morpholinyl)ethyl]-4-biphenylcarboxylate

HRID 2354422Notes

Reaction equation

HRID 2354422 reaction equation
[CH3:1][NH:2][C@H:3]([C:11]1[CH:16]=[CH:15][C:14]([C:17]2[CH:22]=[CH:21][C:20]([C:23]([O:25][CH2:26][CH3:27])=[O:24])=[CH:19][CH:18]=2)=[CH:13][CH:12]=1)[CH2:4][N:5]1[CH2:10][CH2:9][O:8][CH2:7][CH2:6]1.[Cl:28][C:29]1[C:30]([Cl:44])=[CH:31][C:32]2[O:37][CH2:36][C:35](=[O:38])[N:34]([CH2:39][C:40]([OH:42])=O)[C:33]=2[CH:43]=1.C(N(CC)CC)C.F[P-](F)(F)(F)(F)F.N1(O[P+](N(C)C)(N(C)C)N(C)C)C2C=CC=CC=2N=N1>CN(C=O)C>[Cl:28][C:29]1[C:30]([Cl:44])=[CH:31][C:32]2[O:37][CH2:36][C:35](=[O:38])[N:34]([CH2:39][C:40]([N:2]([CH3:1])[C@H:3]([C:11]3[CH:12]=[CH:13][C:14]([C:17]4[CH:22]=[CH:21][C:20]([C:23]([O:25][CH2:26][CH3:27])=[O:24])=[CH:19][CH:18]=4)=[CH:15][CH:16]=3)[CH2:4][N:5]3[CH2:10][CH2:9][O:8][CH2:7][CH2:6]3)=[O:42])[C:33]=2[CH:43]=1

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 151348Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphateHCID 574888462-(6,7-Dichloro-3-oxo-2H-benzo[b][1,4]oxazin-4(3H)-yl)acetic acidHCID 57488870Ethyl 4'-[(1R)-1-(methylamino)-2-(4-morpholinyl)ethyl]-4-biphenylcarboxylate

Product 1

HCID 57488871Ethyl 4'-[(1R)-1-[[(6,7-dichloro-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)acetyl](methyl)amino]-2-(4-morpholinyl)ethyl]-4-biphenylcarboxylateYield 75%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

Ethyl 4′-[(1R)-1-(methylamino)-2-(4-morpholinyl)ethyl]-4-biphenylcarboxylate (crude, 26.5 g) was dissolved in 500 mL of DMF at room temperature with magnetic stirring. The resulting solution was treated with (6,7-dichloro-3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)acetic acid (28.8 g, 80.4 mmol, with 23 wt % LiCl) and cooled to 0° C. To this solution was added triethylamine (20.5 mL, 147.4 mmol) and BOP (35.5 g, 80.4 mmol). The reaction mixture was maintained at room temperature overnight. The reaction mixture was filtered. The filtrate was slowly added to 2500 mL of H2O with vigorous stirring. The resulting precipitate was collected by filtration and partitioned between 300 mL of brine solution and 1000 mL of DCM. The organic layer was dried over MgSO4, filtered, and concentrated. The brown residue was purified by column chromatography (250 g silica gel 60, 230-400 mesh, 2% MeOH and 0.5% NEt3 in CH2Cl2 as eluent) to give the title compound as a brown solid (31.3 g, 75% yield). MS (ES) m/e 626 [M+H]+.

Workup

  1. temperatureThe reaction mixture was maintained at room temperature overnight
  2. filtrationThe reaction mixture was filtered
  3. additionThe filtrate was slowly added to 2500 mL of H2O with vigorous stirring
  4. filtrationThe resulting precipitate was collected by filtration
  5. custompartitioned between 300 mL of brine solution and 1000 mL of DCM
  6. dry with materialThe organic layer was dried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe brown residue was purified by column chromatography (250 g silica gel 60, 230-400 mesh, 2% MeOH and 0.5% NEt3 in CH2Cl2 as eluent)

Sources & evidence

ORD record
ord-7c0163ca57be48a8bb4e256a42914162
Source dataset
uspto-grants-2010_07
Patent number
US07749998B2

Reaction notes

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