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

HRID 1897522Notes

Reaction equation

HRID 1897522 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-b3cb54442e40420cb9dd8d8517161d31
Source dataset
uspto-grants-2013_08
Patent number
US08518983B2

Reaction notes

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