Phthalimide → (R)-tert-butyl 3-(1,3-dioxoisoindolin-2-yl)-3-(3-fluoro-4-(trifluoromethyl)phenyl)propylcarbamate

HRID 2279534Notes

Reaction equation

HRID 2279534 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([C@@H:12](O)[CH2:13][CH2:14][NH:15][C:16](=[O:22])[O:17][C:18]([CH3:21])([CH3:20])[CH3:19])[CH:5]=[CH:6][C:7]=1[C:8]([F:11])([F:10])[F:9].[C:24]1(=[O:34])[C:32]2[C:27](=[CH:28][CH:29]=[CH:30][CH:31]=2)[C:26](=[O:33])[NH:25]1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CCOC(/N=N/C(OCC)=O)=O>C1COCC1>[O:34]=[C:24]1[C:32]2[C:27](=[CH:28][CH:29]=[CH:30][CH:31]=2)[C:26](=[O:33])[N:25]1[C@@H:12]([C:4]1[CH:5]=[CH:6][C:7]([C:8]([F:11])([F:10])[F:9])=[C:2]([F:1])[CH:3]=1)[CH2:13][CH2:14][NH:15][C:16](=[O:22])[O:17][C:18]([CH3:21])([CH3:20])[CH3:19]

Participants

6

Reactant 4

HCID 6809PhthalimideHCID 11776TriphenylphosphineHCID 5462977Diethyl azodicarboxylateHCID 86705528(S)-tert-butyl 3-(3-fluoro-4-(trifluoromethyl)phenyl)-3-hydroxypropylcarbamate

Product 1

HCID 68294223(R)-tert-butyl 3-(1,3-dioxoisoindolin-2-yl)-3-(3-fluoro-4-(trifluoromethyl)phenyl)propylcarbamateYield 42.4%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution of 286 (0.600 g, 1.78 mmol) and THF (15 mL) cooled to 0° C. was added isoindoline-1,3-dione (0.288 g, 1.96 mmol) and PPh3 (0.700 g, 2.67 mmol) followed by the dropwise addition of a THF (6 mL) solution of DEAD (0.420 mL, 2.67 mmol). The reaction was warmed to RT and stirred for 20 h. The reaction was concentrated, triturated with ether and filtered. The resulting filtrate was poured into water and extracted with DCM. The combined organic extracts were dried (MgSO4), filtered, and concentrated in vacuo. The crude product was purified by SiO2 chromatography eluting with hexane/EtOAc (4:1) to afford 0.350 g (42.4%) of (R)-tert-butyl 3-(1,3-dioxoisoindolin-2-yl)-3-(3-fluoro-4-(trifluoromethyl)phenyl)propylcarbamate (288).

Workup

  1. concentrationThe reaction was concentrated
  2. customtriturated with ether
  3. filtrationfiltered
  4. additionThe resulting filtrate was poured into water
  5. extractionextracted with DCM
  6. dry with materialThe combined organic extracts were dried (MgSO4)
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customThe crude product was purified by SiO2 chromatography
  10. washeluting with hexane/EtOAc (4:1)

Sources & evidence

ORD record
ord-6400453aeb9d44c089f94e9dd0a73f93
Source dataset
uspto-grants-2015_09
Patent number
US09133187B2

Reaction notes

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