Triphosgene → 1-(4-(trifluoromethyl)-2-(pyrrolidin-1-yl)benzyl)-3-(3,4-dihydro-3-oxo-2H-benzo[b][1,4]oxazin-8-yl)urea

HRID 1505196Notes

Reaction equation

HRID 1505196 reaction equation
[F:1][C:2]([F:17])([F:16])[C:3]1[CH:8]=[CH:7][C:6]([CH2:9][NH2:10])=[C:5]([N:11]2[CH2:15][CH2:14][CH2:13][CH2:12]2)[CH:4]=1.ClC(Cl)(OC(=O)OC(Cl)(Cl)Cl)Cl.[N-:30]=[C:31]=[O:32].N[C:34]1[C:39]2[O:40][CH2:41][C:42](=[O:44])[NH:43][C:38]=2[CH:37]=[CH:36][CH:35]=1>CCOC(C)=O.CN(C=O)C>[F:17][C:2]([F:1])([F:16])[C:3]1[CH:8]=[CH:7][C:6]([CH2:9][NH:10][C:31]([NH:30][C:34]2[C:39]3[O:40][CH2:41][C:42](=[O:44])[NH:43][C:38]=3[CH:37]=[CH:36][CH:35]=2)=[O:32])=[C:5]([N:11]2[CH2:15][CH2:14][CH2:13][CH2:12]2)[CH:4]=1

Participants

7

Reactant 4

HCID 94429TriphosgeneHCID 105034IsocyanateHCID 115934888-Amino-2H-1,4-benzoxazin-3(4H)-oneHCID 58873466HCID 58873466, compound

Product 1

HCID 534764711-(4-(trifluoromethyl)-2-(pyrrolidin-1-yl)benzyl)-3-(3,4-dihydro-3-oxo-2H-benzo[b][1,4]oxazin-8-yl)ureaYield 9%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent3×

Conditions

Temperature
80 °C

Procedure

Amine 2b (750 mg, 3.1 mmol) (Scheme 7) was dissolved in 20 ml of AcOEt and at 0° C. triphosgene (920 mg, 3.1 mmol) was added to the solution. The mixture was warmed at 80° C. for 4 hours then evaporated and the residue was dissolved in 5 ml of DMF. The solution of the isocyanate was added dropwise to a solution in DMF (10 ml) of compound 1f (620 mg, 3.1 mmol) and the mixture was warmed at 80° C. for 8 hours. (TLC AcOEt 1/petroleum ether 1). The solvent was evaporated and the crude was dissolved in AcOEt (30 ml) and washed with water (1×20 ml) and brine. The organic phase was dried over sodium sulfate and concentrated under vacuum. The purification of the crude residue by chromatographic column gave 120 mg of a white solid. Yield=9% 1HNMR (DMSO, 200 MHz) δ 1.89 (4H, m), 3.20 (4H, m), 4.33 (2H, d, J=5.6 Hz), 4.60 (2H, s), 6.45 (1H, dd, J=8 Hz, J′=1.2 Hz), 6.79 (1H, t, J=8.4 Hz), 7.04 (1H, bs), 7.16 (1H, d), 7.23 (1H, t), 7.35 (1H, d), 7.72 (1H, dd, J=8.2 Hz, J′=1.4 Hz), 8.16 (1H, bs), 10.63 (1H, bs); [M+1] 435.1 (C21H21F3N4O3 requires 434.41).

Workup

  1. additionwas added to the solution
  2. customthen evaporated
  3. dissolutionthe residue was dissolved in 5 ml of DMF
  4. temperaturethe mixture was warmed at 80° C. for 8 hours
  5. customThe solvent was evaporated
  6. dissolutionthe crude was dissolved in AcOEt (30 ml)
  7. washwashed with water (1×20 ml) and brine
  8. dry with materialThe organic phase was dried over sodium sulfate
  9. concentrationconcentrated under vacuum
  10. customThe purification of the crude residue by chromatographic column

Sources & evidence

ORD record
ord-9f11ad3ca85a4a2ab2d783333ce3cee3
Source dataset
uspto-grants-2015_12
Patent number
US09216975B2

Reaction notes

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