Sodium Carbonate → Methyl 4,5-dicyclopropyl-2-isopropoxybenzoate

Temperatur

100 °C

Cyclopropylboronic acid (2.83 g), a 2 M aqueous sodium carbonate solution (33 mL), tris(dibenzylideneacetone)dipalladium(0) (1.41 g), and dicyclohexyl(2′,6′-dimethoxybiphenyl-2-yl)phosphine (1.36 g) were added at room temperature to a toluene (100 mL) solution of methyl 5-bromo-4-cyclopropyl-2-isopropoxybenzoate (6.89 g), and the mixture was stirred at 100° C. for 15 hours in an argon atmosphere. Water was added to the reaction mixture at room temperature. The mixture was filtered through celite, and then, the filtrate was subjected to extraction with ethyl acetate. The obtained organic layer was washed with water and saturated saline in this order and dried over anhydrous magnesium sulfate, and then, the solvent was distilled off under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate) to obtain the title compound (5.90 g).

1. filtrationThe mixture was filtered through celite
2. extractionthe filtrate was subjected to extraction with ethyl acetate
3. washThe obtained organic layer was washed with water and saturated saline in this order
4. dry with materialdried over anhydrous magnesium sulfate
5. distillationthe solvent was distilled off under reduced pressure
6. customThe obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate)

ORD-Eintrag

ord-0ca3f0a21fae44c7aa659bf1236548f8

Quelldatensatz

uspto-grants-2016_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09353108B2