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

HRID 2288157Notes

Reaction equation

HRID 2288157 reaction equation
O[C:2]1([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][C:26]=2[O:31][CH3:32])[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].C([SiH](CC)CC)C.B(F)(F)F.CCOCC.Cl>C(Cl)Cl>[CH3:32][O:31][C:26]1[CH:27]=[CH:28][CH:29]=[CH:30][C:25]=1[CH:2]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]([C:11]2[CH:16]=[CH:15][C:14]3[O:17][CH2:18][O:19][C:13]=3[CH:12]=2)[CH:3]1[C:20]([OH:22])=[O:21]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 8000Boron trifluoride etherateHCID 12052TriethylsilaneHCID 18969641Ethyl (1RS) 1-Hydroxy-1-(methoxyphenyl)-3-(3,4-methylenedioxyphenyl)indene-2-carboxylate

Product 1

HCID 187039001-(2-Methoxyphenyl)-3-(3,4-methylenedioxyphenyl)indane-2-carboxylic acidYield 101.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Ethyl (RS)-1-(2-Methoxyphenyl)-3-(3,4-methylene-dioxyphenyl)indene-2-carboxylate. To a solution of ethyl (1RS)-1-hydroxy-1-(2-methoxyphenyl)-3-(3,4-methylenedioxyphenyl)indene-2-carboxylate (100 mg, 0.23 mmol) in CH2Cl2 (5 ml) was added triethylsilane (32 mg, 0.28 mmol), followed by boron trifluoride etherate (0.13 ml, 1.05 mmol). The reaction mixture was allowed to warm to room temperature and stirred for 10 min, at which time was added slowly 3 M HCl. The mixture was extracted with EtOAc. The organic extract was washed successively with H2O, 5% aqueous NaHCO3, H2O and saturated aqueous NaCl and dried (MgSO4). The solvent was removed in vacuo to provide the title compound (91 mg, 96%) as a mixture of Δ1 and Δ2 double bond isomers.

Workup

  1. extractionThe mixture was extracted with EtOAc
  2. extractionThe organic extract
  3. washwas washed successively with H2O, 5% aqueous NaHCO3, H2O and saturated aqueous NaCl
  4. dry with materialdried (MgSO4)
  5. customThe solvent was removed in vacuo

Sources & evidence

ORD record
ord-7c7d0f43f67447e682f3717921a266bc
Source dataset
uspto-grants-2000_07
Patent number
US06087389

Reaction notes

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