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

HRID 2288142Notes

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].C([SiH](CC)CC)C.[B]>C(Cl)Cl>[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

Conditions

Temperature: 0 °C

Procedure

Ethyl (RS)-1-(4-Methoxyphenyl)-3-(3,4-methylene-dioxyphenyl)indene-2-carboxylate. To a solution of ethyl (1RS)-1-hydroxy-1-(4-methoxyphenyl)-3-(3,4-methylenedioxyphenyl)-indene-2-carboxylate (0.80 g, 1.9 mmol) in CH2Cl2 (10 ml) at 0° C. under an argon atmosphere was added triethylsilane (0.28 g, 2.4 mmol), followed by boron trfluoride etherate (1 ml, 8.1 mmol). The resulting solution was stirred at 0° C. for 10 min, and was then partitioned between EtOAc and 3 M HCl. The organic extract was washed with saturated aqueous NaCl and dried (MgSO4). The solvent was removed in vacuo, and the residue was filtered through a pad of silica gel, eluting with CH2Cl2. The title compound (mixture of Δ1 and Δ2 double bond isomers) was obtained as a glassy, yellow solid (0.72 g, 94%).

Workup

customwas then partitioned between EtOAc and 3 M HCl
extractionThe organic extract
washwas washed with saturated aqueous NaCl
dry with materialdried (MgSO4)
customThe solvent was removed in vacuo
filtrationthe residue was filtered through a pad of silica gel
washeluting with CH2Cl2

Sources & evidence

ORD record: ord-8e314bcea95d42b2922a2605941e957a
Source dataset: uspto-grants-2000_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06087389

Reaction notes

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