Hydrochloric Acid → Ethyl(RS)-1-(2-Methoxyphenyl)-3-(3,4-methylenedioxyphenyl)indene-2-carboxylate

HRID 862942Notes

Reaction equation

HRID 862942 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][CH2:23][CH3:24])=[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)[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][CH2:23][CH3:24])=[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 18969639Ethyl(RS)-1-(2-Methoxyphenyl)-3-(3,4-methylenedioxyphenyl)indene-2-carboxylateYield 96%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

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 3M 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-f7a0c97687424a7b8a2a0b7580ff233b
Source dataset
uspto-grants-1998_02
Patent number
US05719182

Reaction notes

Loading…