Boron tribromide → HCID 9848500, compound

HRID 865642Notes

Reaction equation

HRID 865642 reaction equation
[ClH:1].[N:2]1([CH2:8][CH2:9][O:10][C:11]2[CH:37]=[CH:36][C:14]([O:15][C:16]3[C:25]4[C:20](=[CH:21][C:22]([O:26]C)=[CH:23][CH:24]=4)[CH:19]=[CH:18][C:17]=3[C:28]3[CH:33]=[CH:32][C:31]([O:34]C)=[CH:30][CH:29]=3)=[CH:13][CH:12]=2)[CH2:7][CH2:6][CH2:5][CH2:4][CH2:3]1.B(Br)(Br)Br.C(=O)(O)[O-].[Na+]>C(Cl)Cl>[ClH:1].[N:2]1([CH2:8][CH2:9][O:10][C:11]2[CH:12]=[CH:13][C:14]([O:15][C:16]3[C:25]4[C:20](=[CH:21][C:22]([OH:26])=[CH:23][CH:24]=4)[CH:19]=[CH:18][C:17]=3[C:28]3[CH:29]=[CH:30][C:31]([OH:34])=[CH:32][CH:33]=3)=[CH:36][CH:37]=2)[CH2:7][CH2:6][CH2:5][CH2:4][CH2:3]1

Participants

5

Reactant 3

HCID 25134Boron tribromideHCID 516892Sodium BicarbonateHCID 70168598HCID 70168598, compound

Product 1

HCID 9848500HCID 9848500, compoundYield 84.5%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
8 °C

Procedure

To a solution of 1-[4-[2-(1-piperdinyl)ethoxy]phenoxy]-2-(4-methoxyphenyl)-6-methoxynaphthalene hydrochloride (1.00 g, 1.92 mmol) in 20 mL of anhydrous methylene chloride under N2 at 0° C. was added boron tribromide (0.74 mL, 7.71 mmol). The resulting mixture was allowed to warm to 8° C. and stirred for 2 hours. The reaction was then poured into a stirring solution of cold saturated sodium bicarbonate (200 mL). When gas evolution ceased, the aqueous layer was extracted with 5% methanol/chloroform (3×100 mL). The organic layer was combined, dried (sodium sulfate), and concentrated in vacuo to an oil. The crude free base was dissolved in 20 mL of ethyl acetate, and treated with ethyl ether-hydrochloric acid. A precipitate formed that was collected by filtration. Drying in vacuo provided 798 mg (83%) of 1-[4-[2-(1-piperdinyl)ethoxy]-phenoxy]-2-(4-hydroxyphenyl)-6-hydroxynaphthalene hydrochloride as a white solid. mp 130°-136° C. 1H NMR (DMSO-d6) δ9.89 (s, 1H), 9.80 (bs, 1H), 9.46 (s, 1H), 7.68 (d, J=8.5 Hz, 1H), 7.64 (d, J=9.2 Hz, 1H), 7.50 (d, J=8.5 Hz, 1H), 7.40 (d, J=8.8 Hz, 2H), 7.20 (d, J=2.2 Hz, 1H), 7.04 (dd, J=9.2, 2.2 Hz, 1H), 6.82 (d, J=9.1 Hz, 2H), 6.76 (d, J=8.8 Hz, 2H), 6.61 (d, J=9.1 Hz, 2H), 4.21 (m, 2H), 3.45-3.33 (m, 4H), 2.92 (m, 2H), 1.80-1.63 (m, 5H), 1.35 (m, 1H). FD mass spec: 456. Anal. Calcd. for C29H29NO4 ·1.0 HCl: C, 70.80; H, 6.15; N, 2.85. Found: C, 70.52; H, 6.19; N, 2.55.

Workup

  1. extractionthe aqueous layer was extracted with 5% methanol/chloroform (3×100 mL)
  2. dry with materialdried (sodium sulfate)
  3. concentrationconcentrated in vacuo to an oil
  4. dissolutionThe crude free base was dissolved in 20 mL of ethyl acetate
  5. additiontreated with ethyl ether-hydrochloric acid
  6. customA precipitate formed
  7. filtrationthat was collected by filtration
  8. customDrying in vacuo

Sources & evidence

ORD record
ord-fe697156413d45b1a24122d01b4f26bd
Source dataset
uspto-grants-1996_10
Patent number
US05567712

Reaction notes

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