1,2-Dimethoxyethane → 2-(3,3,5,5-Tetramethylcyclohex-1-enyl)phenol

HRID 32251Notes

Reaction equation

CC1(C)C(C)(C)OB([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=2[OH:15])O1.[CH3:17][C:18]1([CH3:34])[CH2:23][C:22]([CH3:25])([CH3:24])[CH2:21][C:20](OS(C(F)(F)F)(=O)=O)=[CH:19]1.COCCOC.C(=O)([O-])[O-].[Na+].[Na+]>[Cl-].[Na+].O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C(OCC)(=O)C>[CH3:17][C:18]1([CH3:34])[CH2:23][C:22]([CH3:25])([CH3:24])[CH2:21][C:20]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=2[OH:15])=[CH:19]1

Participants

Conditions

Temperature: 90 °C

Procedure

To a mixture of 2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)phenol(3.5 g, 15.9 mmol), trifluoromethanesulfonic acid 3,3,5,5-tetramethylcyclohex-1-enyl ester (5 g, 17.4 mmol) produced in Example (4a) and 1,2-dimethoxyethane (20 mL) were added tetrakis(triphenylphosphine)palladium(0) (0.92 g, 0.79 mmol) and 2N aqueous solution of sodium carbonate (23.9 mL, 47.7 mmol), followed by stirring for 1 hour at an external temperature of 90° C. under a nitrogen atmosphere. Brine was added to the reaction mixture and extraction was performed with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate and then the solvent was distilled off under reduced pressure and the obtained residue was purified by silica gel column chromatography (ethyl acetate/heptane) to give 3.7 g of the title compound as a yellow oil.

Workup

dry with materialThe organic layer was dried over anhydrous magnesium sulfate
distillationthe solvent was distilled off under reduced pressure
customthe obtained residue was purified by silica gel column chromatography (ethyl acetate/heptane)

Sources & evidence

ORD record: ord-f1e3eb10a5b247ef95e4208d5352e5da
Source dataset: uspto-grants-2008_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07425554B2

Reaction notes

Loading…