Sodium Carbonate → (1S,2R)-4'-(2-Hydroxy-1-methyl-4-pyridin-3-yl-butoxy)-2-methyl-biphenyl-4-carbonitrile

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Prepared according to the method described in Example 12b) from (1S,2R)-4-[2-(tert-butyldimethylsilanyloxy)-1-methyl-4-pyridin-3-ylbutoxy]benzeneboronic acid (0.20 g, Example 11)), 4-bromo-3-methylbenzonitrile (0.20 g), 2M aqueous sodium carbonate solution (0.5 ml) and tetrakis(triphenylphosphine)palladium (0) (0.02 g) in toluene (5 ml) and ethanol (2 ml). The reaction mixture was heated at 100° C. under nitrogen for 4 hours. After cooling, the solution was concentrated under reduced pressure. Concentrated hydrochloric acid (1 ml) was added to a solution of the residue in methanol (5 ml) and the suspension stirred at room temperature for 2 hours. The mixture was concentrated under reduced pressure and the residue partitioned between diethyl ether and water. The aqueous layer was neutralised with a saturated solution of sodium bicarbonate in water and extracted with dichloromethane. The combined organics were dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by normal-phase HPLC eluting with a gradient of 0-25% ethanol in dichloromethane to give an oil (0.15 g)

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