Diisopropylamine → 1,1-Dimethylethyl 3-[[(5-chloro-2-thienyl)sulfonyl]({[2-(trimethylsilyl)ethyl]oxy}methyl)amino]-4-(methyloxy)-1H-indazole-1-carboxylate

HRID 1874657Notes

Reaction equation

HRID 1874657 reaction equation
[Cl:1][C:2]1[S:6][C:5]([S:7]([NH:10][C:11]2[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][C:18]=3[O:20][CH3:21])[N:13]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[N:12]=2)(=[O:9])=[O:8])=[CH:4][CH:3]=1.[CH3:29][Si:30]([CH3:37])([CH3:36])[CH2:31][CH2:32][O:33][CH2:34]Cl.C(NC(C)C)(C)C>C(Cl)Cl>[Cl:1][C:2]1[S:6][C:5]([S:7]([N:10]([CH2:34][O:33][CH2:32][CH2:31][Si:30]([CH3:37])([CH3:36])[CH3:29])[C:11]2[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][C:18]=3[O:20][CH3:21])[N:13]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[N:12]=2)(=[O:8])=[O:9])=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 7912DiisopropylamineHCID 27242712-Chloromethyl 2-(trimethylsilyl)ethyl etherHCID 594559961,1-Dimethylethyl 3-{[(5-chloro-2-thienyl)sulfonyl]amino}-4-(methyloxy)-1H-indazole-1-carboxylate

Product 1

HCID 580544941,1-Dimethylethyl 3-[[(5-chloro-2-thienyl)sulfonyl]({[2-(trimethylsilyl)ethyl]oxy}methyl)amino]-4-(methyloxy)-1H-indazole-1-carboxylate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 1,1-dimethylethyl 3-{[(5-chloro-2-thienyl)sulfonyl]amino}-4-(methyloxy)-1H-indazole-1-carboxylate (for a preparation see Intermediate 6) (2.21 g, 4.98 mmol) in DCM (20 mL) was added at 0° C. 2-(trimethylsilyl)ethoxymethyl chloride (1.23 mL, 6.97 mmol). Then was added at 0° C. in a dropwise fashion diisopropylamine (1.419 mL, 9.96 mmol) and the reaction mixture was stirred at room temperature. The reaction was quenched with water (50 mL), the organic layer was separated, and the aqueous layer was further extracted with 30 mL of DCM. The organic solutions were combined, dried with an hydrophobic frit and concentrated under reduced pressure to give a yellow oil that was used without further purification (3.12 g) LCMS (System A) RT=1.64 min, ES+ve m/z 574/576 (M+H)+.

Workup

  1. additionwas added at 0° C
  2. customThe reaction was quenched with water (50 mL)
  3. customthe organic layer was separated
  4. extractionthe aqueous layer was further extracted with 30 mL of DCM
  5. customdried with an hydrophobic frit
  6. concentrationconcentrated under reduced pressure
  7. customto give a yellow oil that
  8. customwas used without further purification (3.12 g) LCMS (System A) RT=1.64 min, ES+ve m/z 574/576 (M+H)+

Sources & evidence

ORD record
ord-eeb4ae0344f84843b7e8ae6bbaaef812
Source dataset
uspto-grants-2012_11
Patent number
US08304446B2

Reaction notes

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