(2-Bromoethoxy)-tert-butyldimethylsilane → HCID 68528803, compound

HRID 2246731Notes

Reaction equation

HRID 2246731 reaction equation
[F:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:10]=1[N:9]([CH2:11][C:12]1[CH:17]=[CH:16][CH:15]=[C:14]([F:18])[CH:13]=1)[C:8](=[O:19])[C:7]2([CH3:21])[CH3:20].C([Li])CCC.Br[CH2:28][CH2:29][O:30][Si:31]([C:34]([CH3:37])([CH3:36])[CH3:35])([CH3:33])[CH3:32]>O1CCCC1>[Si:31]([O:30][CH2:29][CH2:28][CH:11]([N:9]1[C:10]2[C:6](=[CH:5][CH:4]=[CH:3][C:2]=2[F:1])[C:7]([CH3:21])([CH3:20])[C:8]1=[O:19])[C:12]1[CH:17]=[CH:16][CH:15]=[C:14]([F:18])[CH:13]=1)([C:34]([CH3:37])([CH3:36])[CH3:35])([CH3:33])[CH3:32]

Participants

5

Reactant 3

HCID 3608067(2-Bromoethoxy)-tert-butyldimethylsilaneHCID 68528429HCID 68528429, compoundHCID 178418339Butyllithium

Product 1

HCID 68528803HCID 68528803, compoundYield 55%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
25 °C

Procedure

7-fluoro-1-(3-fluorobenzyl)-3,3-dimethyl-1,3-dihydro-2H-indol-2-one (1.01 g, 3.5 mmol) was dissolved in tetrahydrofuran and cooled to −78° C. n-Butyl lithium (2.5 M in hexane, 1.55 mL, 3.97 mmol) was added dropwise and the mixture was warmed to 0° C. (2-Bromoethoxy)-tert-butyldimethylsilane (1.14 mL, 5.25 mmol) was added and the mixture was allowed to warm to 25° C. The mixture was stirred for 16 hours then quenched with saturated aqueous ammonium chloride, diluted with ether, washed with water, and saturated brine. The organic layer was separated, dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The crude product was purified via Isco chromatography (Redisep, silica, gradient 0-10% ethyl acetate in hexane) to afford 0.8 g (55%) 1-[3-{[tert-butyl(dimethyl)silyl]oxy}-1-(3-fluorophenyl)propyl]-7-fluoro-3,3-dimethyl-1,3-dihydro-2H-indol-2-one.

Workup

  1. additionwas added dropwise
  2. additionwas added
  3. customthen quenched with saturated aqueous ammonium chloride
  4. additiondiluted with ether
  5. washwashed with water, and saturated brine
  6. customThe organic layer was separated
  7. dry with materialdried over anhydrous magnesium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo
  10. customThe crude product was purified via Isco chromatography (Redisep, silica, gradient 0-10% ethyl acetate in hexane)

Sources & evidence

ORD record
ord-fc971a38b6e4443fa8bdcbd2ba6fc7cb
Source dataset
uspto-grants-2010_03
Patent number
US07687529B2

Reaction notes

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