Triphenylphosphine → 1-[3-(4-Chloro-2-methyl-2H-pyrazol-3-yl)-4-(3-dimethylamino-propoxy)-phenyl]-3-(2,4-difluoro-phenyl)-urea

HRID 407497Notes

Reaction equation

HRID 407497 reaction equation
[Cl:1][C:2]1[CH:6]=[N:5][N:4]([CH3:7])[C:3]=1[C:8]1[CH:9]=[C:10]([NH:15][C:16]([NH:18][C:19]2[CH:24]=[CH:23][C:22]([F:25])=[CH:21][C:20]=2[F:26])=[O:17])[CH:11]=[CH:12][C:13]=1[OH:14].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH3:46][N:47]([CH3:52])[CH2:48][CH2:49][CH2:50]O.N(C(OC(C)C)=O)=NC(OC(C)C)=O>C1COCC1>[Cl:1][C:2]1[CH:6]=[N:5][N:4]([CH3:7])[C:3]=1[C:8]1[CH:9]=[C:10]([NH:15][C:16]([NH:18][C:19]2[CH:24]=[CH:23][C:22]([F:25])=[CH:21][C:20]=2[F:26])=[O:17])[CH:11]=[CH:12][C:13]=1[O:14][CH2:50][CH2:49][CH2:48][N:47]([CH3:52])[CH3:46]

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 766463-(Dimethylamino)-1-propanolHCID 1356979371-[3-(4-Chloro-2-methyl-2H-pyrazol-3-yl)4-hydroxy-phenyl]-3-(2,4-difluoro-phenyl)-urea

Product 1

HCID 231394391-[3-(4-Chloro-2-methyl-2H-pyrazol-3-yl)-4-(3-dimethylamino-propoxy)-phenyl]-3-(2,4-difluoro-phenyl)-ureaYield 25.4%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 1-[3-(4-chloro-2-methyl-2H-pyrazol-3yl)-4-hydroxy-phenyl]-3-(2,4-difluoro-phenyl)urea (see above) (0.035 g, 0.09 mmol) in THF (3 mL), triphenyl phosphine (0.071 g, 0.27 mmol) and 3-dimethylamino propanol (31.6 μL, 0.27 mmol) were added followed by dropwise addition of diisopropyl azodicarboxylate (DIAD) (52.3 μL, 0.27 mmol). The reaction mixture was stirred at room temperature for 2 hours, concentrated to give a crude product that was purified via preparative HPLC. The corresponding fractions were collected, neutralized with 1N NaOH and extracted with EtOAc four times. A second purification by flash chromatography (SiO2, CH2Cl2/MeOH gradient elution) afforded Compound 133 as an off-white solid in 25.4% yield. LCMS m/z (%)=464 (M+H 35Cl, 100), 466 (M+H 37Cl, 39). 1H NMR (400 MHz, DMSO-d6) δ: 9.02 (s, 1H), 8.47 (s, 1H), 8.07-8.01 (m, 1H), 7.62 (s, 1H), 7.51 (d, J=8.90 Hz, 1H), 7.38 (s, 1H), 7.33-7.28 (m, 1H), 7.15 (d, J=9.02 Hz, 1H), 7.03-6.97 (m, 1H), 4.11-3.94 (m, 2H), 3.63 (s, 3H), 2.28-2.18 (m, 2H), 2.11 (s, 6H), 1.78-1.69 (m, 2H).

Workup

  1. concentrationconcentrated
  2. customto give a crude product that
  3. customwas purified via preparative HPLC
  4. customThe corresponding fractions were collected
  5. extractionextracted with EtOAc four times
  6. customA second purification
  7. washby flash chromatography (SiO2, CH2Cl2/MeOH gradient elution)

Sources & evidence

ORD record
ord-14da9c0cdfa04ecabfa22cca75ee91db
Source dataset
uspto-grants-2014_06
Patent number
US08754238B2

Reaction notes

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