Phthalimide → (S)-2-(2-(tert-butyldimethylsilyloxy)-1-(4-chloro-3-fluorophenyl)ethyl)isoindoline-1,3-dione

HRID 2279451Notes

Reaction equation

HRID 2279451 reaction equation
[Si:1]([O:8][CH2:9][C@@H:10]([C:12]1[CH:17]=[CH:16][C:15]([Cl:18])=[C:14]([F:19])[CH:13]=1)O)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[C:20]1(=[O:30])[C:28]2[C:23](=[CH:24][CH:25]=[CH:26][CH:27]=2)[C:22](=[O:29])[NH:21]1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CCOC(/N=N/C(OCC)=O)=O>C1(C)C=CC=CC=1.C1COCC1>[Si:1]([O:8][CH2:9][C@@H:10]([N:21]1[C:22](=[O:29])[C:23]2[C:28](=[CH:27][CH:26]=[CH:25][CH:24]=2)[C:20]1=[O:30])[C:12]1[CH:17]=[CH:16][C:15]([Cl:18])=[C:14]([F:19])[CH:13]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 6809PhthalimideHCID 11776TriphenylphosphineHCID 5462977Diethyl azodicarboxylateHCID 86696647(R)-2-((tert-butyldimethylsilyl)oxy)-1-(4-chloro-3-fluorophenyl)ethanol

Product 1

HCID 68294575(S)-2-(2-(tert-butyldimethylsilyloxy)-1-(4-chloro-3-fluorophenyl)ethyl)isoindoline-1,3-dioneYield 74.7%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 64 (13.50 g, 44.28 mmol) and THF (150 mL) cooled to 0° C. was added isoindoline-1,3-dione (7.167 g, 48.71 mmol) and PPh3 (17.42 g, 66.42 mmol) followed by the dropwise addition of a 40% solution DEAD (26.15 mL, 66.42 mmol) in toluene. The reaction was warmed to RT and stirred for 20 h. The reaction was concentrated and dissolved in Et2O (might require sonication). The solids were filtered and the filtrate was concentrated. The crude residue was purified by SiO2 chromatography (Biotage 65) eluting with 10% EtOAc/hexane to afford 14.35 g of (74.67%) (S)-2-(2-(tert-butyldimethylsilyloxy)-1-(4-chloro-3-fluorophenyl)ethyl)isoindoline-1,3-dione (66).

Workup

  1. concentrationThe reaction was concentrated
  2. dissolutiondissolved in Et2O (might require sonication)
  3. filtrationThe solids were filtered
  4. concentrationthe filtrate was concentrated
  5. customThe crude residue was purified by SiO2 chromatography (Biotage 65)
  6. washeluting with 10% EtOAc/hexane

Sources & evidence

ORD record
ord-712bda607fa74f87bec6d037616bfd63
Source dataset
uspto-grants-2015_09
Patent number
US09133187B2

Reaction notes

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