Phenyl isocyanate → (R)-1-(6-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)imidazo[1,2-b]pyridazin-3-yl)-3-phenylurea

HRID 2096293Notes

Reaction equation

HRID 2096293 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([F:8])=[CH:4][C:3]=1[C@H:9]1[CH2:13][CH2:12][CH2:11][N:10]1[C:14]1[CH:15]=[CH:16][C:17]2[N:18]([C:20]([NH2:23])=[CH:21][N:22]=2)[N:19]=1.[N:24]([C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)=[C:25]=[O:26]>C(Cl)Cl>[F:1][C:2]1[CH:7]=[CH:6][C:5]([F:8])=[CH:4][C:3]=1[C@H:9]1[CH2:13][CH2:12][CH2:11][N:10]1[C:14]1[CH:15]=[CH:16][C:17]2[N:18]([C:20]([NH:23][C:25]([NH:24][C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=3)=[O:26])=[CH:21][N:22]=2)[N:19]=1

Participants

4

Reactant 2

HCID 7672Phenyl isocyanateHCID 58334496(R)-6-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)imidazo[1,2-b]pyridazin-3-amine

Product 1

HCID 45273998(R)-1-(6-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)imidazo[1,2-b]pyridazin-3-yl)-3-phenylureaYield 60.6%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Procedure

To a DCM (0.1 mL) solution of (R)-6-(2-(2,5-difluorophenyl)pyrrolidin-1-yl)imidazo[1,2-b]pyridazin-3-amine (Preparation B; 6 mg, 0.019 mmol) cooled in an ice bath was added the isocyanatobenzene (2.5 mg, 0.021 mmol) in DCM (0.1 mL) dropwise. The reaction was slowly warmed to ambient temperature and stirred for 1 hour. The reaction was diluted with DCM (2 mL), washed with water, and concentrated. The crude product was purified by silica gel chromatography (eluent=50% EtOAc/hexanes first, then 5% MeOH in DCM) to yield the pure final product as a solid (5 mg, 60%). MS (apci) m/z=435.2 (M+H).

Workup

  1. washwashed with water
  2. concentrationconcentrated
  3. customThe crude product was purified by silica gel chromatography (eluent=50% EtOAc/hexanes first

Sources & evidence

ORD record
ord-d800321b9440497382043f0effe71c3e
Source dataset
uspto-grants-2013_05
Patent number
US08450322B2

Reaction notes

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