Trifluoroacetic acid → 2-Benzyl-5-methoxy-2,3,3a,8a-tetrahydro-1H-2-aza-cyclopenta[a]inden-8-one

HRID 546280Notes

Reaction equation

HRID 546280 reaction equation
CO[CH2:3][N:4]([CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)[CH2:5][Si](C)(C)C.C(O)(C(F)(F)F)=O.[CH3:24][O:25][C:26]1[CH:27]=[C:28]2[C:32](=[CH:33][CH:34]=1)[C:31](=[O:35])[CH:30]=[CH:29]2>C(Cl)Cl>[CH2:10]([N:4]1[CH2:3][CH:29]2[C:28]3[CH:27]=[C:26]([O:25][CH3:24])[CH:34]=[CH:33][C:32]=3[C:31](=[O:35])[CH:30]2[CH2:5]1)[C:11]1[CH:12]=[CH:13][CH:14]=[CH:15][CH:16]=1

Participants

5

Reactant 3

HCID 6422Trifluoroacetic acidHCID 353442Benzyl(methoxymethyl)((trimethylsilyl)methyl)amineHCID 110409905-Methoxy-1H-inden-1-one

Product 1

HCID 672034582-Benzyl-5-methoxy-2,3,3a,8a-tetrahydro-1H-2-aza-cyclopenta[a]inden-8-one

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

N-(Methoxymethyl)-N-(trimethylsilylmethyl)benzylamine (17.3 mL, 67.6 mmol) and TFA (3.4 mL) were added to a solution of 5-methoxy-inden-1-one (5.4 g, 33.8 mmol) in CH2Cl2 (165 mL) at 0° C. The reaction was stirred for 3 hours at room temperature and quenched with saturated aqueous NaHCO3 (165 mL). The organic layer was separated, washed with brine (100 mL), dried over MgSO4, and concentrated to afford the subtitle compound, which was used without further purification. MS calculated for C19H19NO2+H: 294, observed: 294.

Workup

  1. customquenched with saturated aqueous NaHCO3 (165 mL)
  2. customThe organic layer was separated
  3. washwashed with brine (100 mL)
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-28b57f54fd5b4f5a947ee4f97c5d2443
Source dataset
uspto-grants-2011_05
Patent number
US07935830B2

Reaction notes

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