tert-Butyl 2-(7-(4-Cyclopentyl-3-(trifluoromethyl)benzyloxy)-9-iodo-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetate → tert-Butyl 2-(7-(4-Cyclopentyl-3-(trifluoromethyl)benzyloxy)-9-methyl-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetate

HRID 515680Notes

Reaction equation

HRID 515680 reaction equation
[CH:1]1([C:6]2[CH:34]=[CH:33][C:9]([CH2:10][O:11][C:12]3[CH:20]=[CH:19][C:18]4[N:17]5[CH2:21][CH2:22][CH:23]([CH2:24][C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])[C:16]5=[C:15](I)[C:14]=4[CH:13]=3)=[CH:8][C:7]=2[C:35]([F:38])([F:37])[F:36])[CH2:5][CH2:4][CH2:3][CH2:2]1.[Cl-].[CH3:40][Zn+]>C1COCC1.CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C>[CH:1]1([C:6]2[CH:34]=[CH:33][C:9]([CH2:10][O:11][C:12]3[CH:20]=[CH:19][C:18]4[N:17]5[CH2:21][CH2:22][CH:23]([CH2:24][C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])[C:16]5=[C:15]([CH3:40])[C:14]=4[CH:13]=3)=[CH:8][C:7]=2[C:35]([F:38])([F:37])[F:36])[CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

5

Reactant 2

HCID 67249572tert-Butyl 2-(7-(4-Cyclopentyl-3-(trifluoromethyl)benzyloxy)-9-iodo-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetateHCID 178477797HCID 178477797, compound

Product 1

HCID 67376009tert-Butyl 2-(7-(4-Cyclopentyl-3-(trifluoromethyl)benzyloxy)-9-methyl-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetateYield 51.3%

Reagents, catalysts & solvents 2

HCID 178418851HCID 178418851, compoundCatalystHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
70 °C

Procedure

To a solution of tert-butyl 2-(7-(4-cyclopentyl-3-(trifluoromethyl)benzyloxy)-9-iodo-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetate (50.0 mg, 0.078 mmol) in THF (1 mL) in a heavy-walled sealed microwave tube (0.5-2.0 mL) under N2 was added methylzinc(II) chloride (2.0 M in THF, 0.055 mL, 0.109 mmol) and bis(tri-t-butylphosphine)palladium(0) (3.60 mg, 7.04 μmol). The reaction mixture was then heated to 70° C. for 2 h, quenched with saturated NaHCO3 and filtered by vacuum filtration through a pad of Celite®. The pad of Celite® was washed with EtOAc (2×5 mL). The filtrate was extracted with EtOAc (3×5 mL). The organic layers were combined and washed with saturated NaCl (1×10 mL), dried over MgSO4 and filtered by vacuum filtration. The filtrate was concentrated under reduced pressure. The residue was purified by preparative TLC to give the title compound as a colorless oil (21.1 mg). LCMS m/z=528.3 [M+H]+; 1H NMR (400 MHz, CDCl3) δ ppm 1.45 (s, 9H), 1.56-1.66 (m, 2H), 1.68-1.79 (m, 2H), 1.81-1.92 (m, 2H), 2.04-2.15 (m, 2H), 2.23 (s, 3H), 2.26-2.36 (m, 1H), 2.41 (dd, J=15.66, 10.11 Hz, 1H), 2.78-2.90 (m, 2H), 3.31-3.44 (m, 1H), 3.65-3.74 (m, 1H), 3.90-3.98 (m, 1H), 3.99-4.12 (m, 1H), 5.09 (s, 2H), 6.85 (dd, J=8.72, 2.40 Hz, 1H), 7.03 (d, J=2.15 Hz, 1H), 7.09 (d, J=8.72 Hz, 1H), 7.47 (d, J=8.08 Hz, 1H), 7.60 (d, J=8.21 Hz, 1H), 7.71 (d, J=1.39 Hz, 1H).

Workup

  1. customquenched with saturated NaHCO3
  2. filtrationfiltered by vacuum filtration through a pad of Celite®
  3. washThe pad of Celite® was washed with EtOAc (2×5 mL)
  4. extractionThe filtrate was extracted with EtOAc (3×5 mL)
  5. washwashed with saturated NaCl (1×10 mL)
  6. dry with materialdried over MgSO4
  7. filtrationfiltered by vacuum filtration
  8. concentrationThe filtrate was concentrated under reduced pressure
  9. customThe residue was purified by preparative TLC

Sources & evidence

ORD record
ord-e77d8fbb59c44ccb82b7213664ff82fa
Source dataset
uspto-grants-2015_08
Patent number
US09108969B2

Reaction notes

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