Sodium Carbonate → HCID 20692739, Verbindung

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)), 2-(3-bromophenyl)-N-methyl-acetamide (0.244 g, Example 24a)), 2M aqueous sodium carbonate (0.265 ml) and tetrakis(triphenylphosphine)palladium (0) (0.1 g) in toluene (5 ml) and ethanol (2 ml). The reaction was heated at 110° C. for 6 hours. After cooling, the solution was concentrated under reduced pressure the residue was dissolved in methanol (10 ml), concentrated hydrochloric acid (1 ml) was added and the solution stirred at room temperature for 18 hours. The mixture was concentrated under reduced pressure the residue was neutralised using saturated sodium hydrogen carbonate and extracted with ethyl acetate. The combined extracts 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 0-10% ethanol in dichloromethane to give the title compound as an oil which was converted to the oxalic acid salt by treatment with a saturated ethereal solution of oxalic acid to give the title compound as a gum (0.123 g).

Herkunft & Nachweise