N-Hydroxyphthalimide → 2-[4-(Tert-butyl-diphenyl-silanyloxy)-butoxy]-isoindole-1,3-dione

HRID 2218446Notes

Reaction equation

HRID 2218446 reaction equation
[C:1]([Si:5]([C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)[O:6][CH2:7][CH2:8][CH2:9][CH2:10][OH:11])([CH3:4])([CH3:3])[CH3:2].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.O[N:44]1[C:48](=[O:49])[C:47]2=[CH:50][CH:51]=[CH:52][CH:53]=[C:46]2[C:45]1=[O:54].N(C(OCC)=O)=NC(OCC)=O>O1CCCC1>[C:1]([Si:5]([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)([C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[O:6][CH2:7][CH2:8][CH2:9][CH2:10][O:11][N:44]1[C:48](=[O:49])[C:47]2[C:46](=[CH:53][CH:52]=[CH:51][CH:50]=2)[C:45]1=[O:54])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 10665N-HydroxyphthalimideHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 100651081-Butanol, 4-[[(1,1-dimethylethyl)diphenylsilyl]oxy]-

Product 1

HCID 222863132-[4-(Tert-butyl-diphenyl-silanyloxy)-butoxy]-isoindole-1,3-dioneYield 77%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

4-(tert-Butyl-diphenyl-silanyloxy)-butan-1-ol (10.0 g, 30.5 mmol), triphenylphosphine (8.0 g, 30 mmol), and N-hydroxyphthalimide (4.97 g, 30.5 mmol) were combined in anhydrous tetrahydrofuran (200 ml) att 0° C. and the resultant solution was stirred at 0° C. for 1 hour. Diethyl azodicarboxylate (5.31 g, 30.5 mmol) was added at 0° C., and the reaction mixture was allowed to gradually warm to room temperature and stirred overnight. The reaction mixture was concentrated under reduced pressure and the residue was dissolved in chloroform. Precipitation ensued, and the white solid was removed by filtration. The filtrate was concentrated and purified with column chromatography (hexane/ethyl acetate (3/1)) to afford 2-[4-(tert-butyl-diphenyl-silanyloxy)-butoxy]-isoindole-1,3-dione (11.06 g, 77% yield) as colorless crystals: 1H NMR (400 MHz, DMSO-d6) δ 7.84 (4H, s), 7.59 (4H, dd, J=7.6, 1.0 Hz), 7.39-7.43 (6H, m), 4.13 (2H, t, J=6.4 Hz), 3.68 (2H, t, J=5.8 Hz), 1.67-1.78 (4H, m), 0.95 (9H, s).

Workup

  1. concentrationThe reaction mixture was concentrated under reduced pressure
  2. dissolutionthe residue was dissolved in chloroform
  3. customPrecipitation
  4. customthe white solid was removed by filtration
  5. concentrationThe filtrate was concentrated
  6. custompurified with column chromatography (hexane/ethyl acetate (3/1))

Sources & evidence

ORD record
ord-e002af9dadbb48a1838c5d8850d10c9e
Source dataset
uspto-grants-2008_08
Patent number
US07411001B2

Reaction notes

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