Bromopropylmagnesium → 1-[3-(5-Fluoro-3-methyl-benzo[b]thiophen-2-yl)-2,6-dimethyl-imidazo[1,2-b]pyridazin-8-yl]-butan-1-one

HRID 226116

Reaction equation

HRID 226116 reaction equation
[CH3:1][CH2:2][CH2-:3].[Mg+2].[Br-].CON(C)[C:9]([C:11]1[C:12]2[N:13]([C:18]([C:22]3[S:26][C:25]4[CH:27]=[CH:28][C:29]([F:31])=[CH:30][C:24]=4[C:23]=3[CH3:32])=[C:19]([CH3:21])[N:20]=2)[N:14]=[C:15]([CH3:17])[CH:16]=1)=[O:10]>C1COCC1>[F:31][C:29]1[CH:28]=[CH:27][C:25]2[S:26][C:22]([C:18]3[N:13]4[N:14]=[C:15]([CH3:17])[CH:16]=[C:11]([C:9](=[O:10])[CH2:1][CH2:2][CH3:3])[C:12]4=[N:20][C:19]=3[CH3:21])=[C:23]([CH3:32])[C:24]=2[CH:30]=1

Participants

4

Reactant 2

HCID 101916BromopropylmagnesiumHCID 866210453-(5-Fluoro-3-methyl-benzo[b]thiophen-2-yl)-2,6-dimethyl-imidazo[1,2-b]pyridazine-8-carboxylic acid methoxy-methyl-amide

Product 1

HCID 688590651-[3-(5-Fluoro-3-methyl-benzo[b]thiophen-2-yl)-2,6-dimethyl-imidazo[1,2-b]pyridazin-8-yl]-butan-1-oneYield 463.8%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

N-Propylmagnesium bromide (0.303 g, 2.06 mmol) is added dropwise to a solution of 3-(5-fluoro-3-methyl-benzo[b]thiophen-2-yl)-2,6-dimethyl-imidazo[1,2-b]pyridazine-8-carboxylic acid methoxy-methyl-amide (0.21 g, 0.52 mmol) in THF (5 mL) at 0° C. The reaction is stirred at room temperature overnight. The mixture is quenched with H2O, extracted with CH2Cl2, dried over sodium sulfate, filtered, and concentrated to dryness. The crude is purified through an ISCO column (5-10% EtOAc/Hexane) to give the title compound (0.92 g, 42%). 1H NMR (CDCl3): δ 7.8 (dd, J=4.8, 8.5 Hz, 1H), 7.5 (dd, J=2.5, 9.7 Hz, 1H), 7.4 (s, 1H), 7.2 (m, 1H), 3.6 (t, J=5.7, 2H), 2.6 (s, 3H), 2.55 (s, 3H), 2.3 (s, 3H), 1.9 (m, 2H), 1.1 (t, J=7.5, 3H) ppm. MS (m/e): 382 (M+1).

Workup

  1. customThe mixture is quenched with H2O
  2. extractionextracted with CH2Cl2
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated to dryness
  6. customThe crude is purified through an ISCO column (5-10% EtOAc/Hexane)

Sources & evidence

ORD record
ord-6fda92cc3b3b47ec977a3e89d2c84380
Source dataset
uspto-grants-2009_07
Patent number
US07557103B2

Linked notes

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