2,6-Lutidine → 2-{1-[2-(tert-butyldimethylsilanyloxy)-2-methyl-propyl]-1H-indazol-5-yloxy}-5-fluorobenzonitrile

HRID 2112227Notes

Reaction equation

HRID 2112227 reaction equation
[F:1][C:2]1[CH:3]=[CH:4][C:5]([O:10][C:11]2[CH:12]=[C:13]3[C:17](=[CH:18][CH:19]=2)[N:16]([CH2:20][C:21]([OH:24])([CH3:23])[CH3:22])[N:15]=[CH:14]3)=[C:6]([CH:9]=1)[C:7]#[N:8].N1C(C)=CC=CC=1C.[Si:33](OS(C(F)(F)F)(=O)=O)([C:36]([CH3:39])([CH3:38])[CH3:37])([CH3:35])[CH3:34]>ClCCl.CCOCC>[Si:33]([O:24][C:21]([CH3:22])([CH3:23])[CH2:20][N:16]1[C:17]2[C:13](=[CH:12][C:11]([O:10][C:5]3[CH:4]=[CH:3][C:2]([F:1])=[CH:9][C:6]=3[C:7]#[N:8])=[CH:19][CH:18]=2)[CH:14]=[N:15]1)([C:36]([CH3:39])([CH3:38])[CH3:37])([CH3:35])[CH3:34]

Participants

6

Reactant 3

HCID 79372,6-LutidineHCID 123564tert-Butyldimethylsilyl trifluoromethanesulphonateHCID 674118315-Fluoro-2-[1-(2-hydroxy-2-methylpropyl)-1H-indazol-5-yloxy]-benzonitrile

Product 1

HCID 674118002-{1-[2-(tert-butyldimethylsilanyloxy)-2-methyl-propyl]-1H-indazol-5-yloxy}-5-fluorobenzonitrileYield 94%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolvent

Procedure

To a cooled (0° C.) solution of 5-Fluoro-2-[1-(2-hydroxy-2-methylpropyl)-1H-indazol-5-yloxy]-benzonitrile (0.070 g, 0.215 mmol) and 2,6-lutidine (0.030 g, 0.284 mmol) in dichloromethane (2 mL) was added TBSOTf (0.063 g, 0.240 mmol). The reaction mixture was warmed to room temperature and stirred for 1 hour. The mixture was diluted with ether (50 mL) and washed with 0.2N HCl, NaHCO3, and brine, dried over MgSO4, and concentrated under reduced pressure. The residue was chromatographed eluting with ether/hexanes (1:3) to afford 0.071 g of pale yellow oil (94% yield).

Workup

  1. washwashed with 0.2N HCl, NaHCO3, and brine
  2. dry with materialdried over MgSO4
  3. concentrationconcentrated under reduced pressure
  4. customThe residue was chromatographed
  5. washeluting with ether/hexanes (1:3)

Sources & evidence

ORD record
ord-1c81d75459344cc7a5cd175b24619fab
Source dataset
uspto-grants-2009_04
Patent number
US07521447B2

Reaction notes

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