4-Bromoanisole → 1-(4-Methoxyphenyl)-3-(3,4-methylenedioxyphenyl)indane-2-carboxylic acid

HRID 2288141Notes

Reaction equation

HRID 2288141 reaction equation
O[C:2]1([C:25]2[CH:30]=[CH:29][C:28]([O:31][CH3:32])=[CH:27][CH:26]=2)[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[C:4]([C:11]2[CH:16]=[CH:15][C:14]3[O:17][CH2:18][O:19][C:13]=3[CH:12]=2)=[C:3]1[C:20]([O:22]CC)=[O:21].BrC1C=CC(OC)=CC=1.[Mg].COC1C=CC([Mg]Br)=CC=1.C1OC2C=CC(C3C4C(=CC=CC=4)C(=O)C=3C(OCC)=O)=CC=2O1>CCOCC.C1COCC1>[CH3:32][O:31][C:28]1[CH:29]=[CH:30][C:25]([CH:2]2[C:10]3[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=3)[CH:4]([C:11]3[CH:16]=[CH:15][C:14]4[O:17][CH2:18][O:19][C:13]=4[CH:12]=3)[CH:3]2[C:20]([OH:22])=[O:21])=[CH:26][CH:27]=1

Participants

7

Reactant 5

HCID 77304-BromoanisoleHCID 5462224MagnesiumHCID 18427631Ethyl 3-(3,4-methylenedioxyphenyl)1-oxoindene-2-carboxylateHCID 18969645Ethyl(1RS)-1-Hydroxy-1-(4-methoxyphenyl)-3-(3,4-methylenedioxyphenyl)indene-2-carboxylateHCID 178491912HCID 178491912, compound

Product 1

HCID 159085001-(4-Methoxyphenyl)-3-(3,4-methylenedioxyphenyl)indane-2-carboxylic acidYield 80%

Reagents, catalysts & solvents 1

HCID 21868444Ether tetrahydrofuranSolvent2×

Procedure

Ethyl (1RS)-1-Hydroxy-1-(4-methoxyphenyl)-3-(3,4-methylenedioxyphenyl)indene-2-carboxylate. A solution of 4-bromoanisole (0.89 g, 5.0 mmol) in 9:1 Et2O/THF (10 ml) was added to magnesium turnings (0.105 g, 5.0 mmol), and the resulting mixture was allowed to stir for 30 min. The resultant 4-methoxyphenyl magnesium bromide was added dropwise to a solution of ethyl 3-(3,4-methylenedioxyphenyl)-1-oxoindene-2-carboxylate (0.77 g, 2.4 mmol) in 10:1 Et2O/ THF (55 ml) at 0° C. The resulting mixture was stirred at 0° C. for 1 h and was then partitioned between EtOAc and 1 M HCl. The aqueous phase was extracted with EtOAc, and the combined organic extracts were washed successively with 5% aqueous NaHCO3 and saturated aqueous NaCl and dried (MgSO4). The solvent was removed under reduced pressure, and the residue was purified by flash chromatography on silica gel, eluting with 10% EtOAc/hexanes to afford the title compound as a yellow glassy solid (0.80 g, 80%).

Workup

  1. stirringThe resulting mixture was stirred at 0° C. for 1 h
  2. customwas then partitioned between EtOAc and 1 M HCl
  3. extractionThe aqueous phase was extracted with EtOAc
  4. washthe combined organic extracts were washed successively with 5% aqueous NaHCO3 and saturated aqueous NaCl
  5. dry with materialdried (MgSO4)
  6. customThe solvent was removed under reduced pressure
  7. customthe residue was purified by flash chromatography on silica gel
  8. washeluting with 10% EtOAc/hexanes

Sources & evidence

ORD record
ord-438c546d95144440a92805fb5dda16af
Source dataset
uspto-grants-2000_07
Patent number
US06087389

Reaction notes

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