Potassium Carbonate → Methyl 3-{[3-[[(5-chloro-2-thienyl)sulfonyl]({[2-(trimethylsilyl)ethyl]oxy}methyl)amino]-4-(methyloxy)-1H-indazol-1-yl]methyl}benzoate

HRID 1874676Notes

Reaction equation

HRID 1874676 reaction equation
[Cl:1][C:2]1[S:6][C:5]([S:7]([N:10]([C:19]2[C:27]3[C:22](=[CH:23][CH:24]=[CH:25][C:26]=3[O:28][CH3:29])[NH:21][N:20]=2)[CH2:11][O:12][CH2:13][CH2:14][Si:15]([CH3:18])([CH3:17])[CH3:16])(=[O:9])=[O:8])=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:37][C:38]1[CH:39]=[C:40]([CH:45]=[CH:46][CH:47]=1)[C:41]([O:43][CH3:44])=[O:42]>CN(C=O)C.C(Cl)Cl.O>[Cl:1][C:2]1[S:6][C:5]([S:7]([N:10]([CH2:11][O:12][CH2:13][CH2:14][Si:15]([CH3:18])([CH3:16])[CH3:17])[C:19]2[C:27]3[C:22](=[CH:23][CH:24]=[CH:25][C:26]=3[O:28][CH3:29])[N:21]([CH2:37][C:38]3[CH:39]=[C:40]([CH:45]=[CH:46][CH:47]=3)[C:41]([O:43][CH3:44])=[O:42])[N:20]=2)(=[O:9])=[O:8])=[CH:4][CH:3]=1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 517981Methyl 3-(bromomethyl)benzoateHCID 580544435-chloro-N-[4-(methyloxy)-1H-indazol-3-yl]-N-({[2-(trimethylsilyl)ethyl]oxy}methyl)-2-thiophenesulfonamide

Product 1

HCID 58054540Methyl 3-{[3-[[(5-chloro-2-thienyl)sulfonyl]({[2-(trimethylsilyl)ethyl]oxy}methyl)amino]-4-(methyloxy)-1H-indazol-1-yl]methyl}benzoateYield 44%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
50 °C

Procedure

A solution of 5-chloro-N-[4-(methyloxy)-1H-indazol-3-yl]-N-({[2-(trimethylsilyl)ethyl]oxy}methyl)-2-thiophenesulfonamide (for a preparation see Intermediate 8) (1 g, 2.11 mmol) in DMF (10 mL) was treated at ambient temperature with potassium carbonate (0.583 g, 4.22 mmol) and methyl 3-(bromomethyl)benzoate (Alfa Aesar) (0.580 g, 2.53 mmol). The resulting mixture was stirred at 50° C. for 2 h and the LCMS then showed product as the major peak. The mixture was diluted with DCM (20 mL) and of water (20 mL). The organic phase was separated and the aqueous layer was further extracted with DCM (20 mL). The combined organic solutions were washed with brine (30 mL), dried over an hydrophobic frit, and concentrated under reduced pressure. The residue was loaded in dichloromethane to a silica 100 g cartridge and purified by chromatography on Flashmaster II using a 0-100% gradient B in A, A beeing neat DCM and B being a 5% EtOAC in DCM solution over 40 min. and then further purified on a second cartridge silica 70 g using a 0-100% gradient B in A, A beeing neat DCM and B being a 5% EtOAC in DCM solution over 40 min. The appropriate fractions were combined and evaporated in vacuo to give the title compound (571 mg, 44%) as a gum. LCMS (System A) RT=1.60 min, ES+ve m/z 639/641 (M+NH4)+.

Workup

  1. customThe organic phase was separated
  2. extractionthe aqueous layer was further extracted with DCM (20 mL)
  3. washThe combined organic solutions were washed with brine (30 mL)
  4. customdried over an hydrophobic frit
  5. concentrationconcentrated under reduced pressure
  6. custompurified by chromatography on Flashmaster II
  7. customover 40 min.
  8. customfurther purified on a second cartridge silica 70 g
  9. customover 40 min
  10. customevaporated in vacuo

Sources & evidence

ORD record
ord-a6a36d4fb1c74a1f888b9fce71033356
Source dataset
uspto-grants-2012_11
Patent number
US08304446B2

Reaction notes

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