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

HRID 1892893Notes

Reaction equation

HRID 1892893 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-2d9bcd4130994473b0ec1dfd2d2cb30a
Source dataset
uspto-grants-2013_08
Patent number
US08507543B2

Reaction notes

Loading…