Sodium Bicarbonate → (S)-6-(2-hydroxy-2-methylpropyl)-3-((S)-1-{4-[1-(oxetan-3-yl)-2-oxo-1,2-dihydropyridin-4-yl]phenyl}ethyl)-6-phenyl-1,3-oxazinan-2-one

Participants

Reaction Steps

Pd(PPh3)4 (10 mg) was added to a solution of 4-bromo-1-(oxetan-3-yl)pyridin-2(1H)-one (14 mg) in 1,2-dimethoxyethane (6 mL) under nitrogen. The formed mixture was stirred at room temperature for 1 h prior to the addition of (S)-6-(2-hydroxy-2-methylpropyl)-6-phenyl-3-{(S)-1-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]ethyl}-1,3-oxazinan-2-one (24 mg) in ethanol (2 mL) followed by saturated aqueous NaHCO3 solution (2 mL). The mixture was stirred at 100° C. for 2 h. After cooling to room temperature, the reaction was quenched with water and the resulting mixture was extracted with ethyl acetate (3×). The combined organic phase was concentrated and the residue was purified by preparative HPLC to give the title compound. Yield: 14 mg (55% of theory); LC (method 4): tR=0.97 min; Mass spectrum (ESI+): m/z=445 [M-Me2CO+H]+; 1H NMR (CDCl3) δ 1.09 (s, 3H), 1.12 (s, 3H), 1.45 (d, 3H), 2.10-2.30 (m, 4H), 2.35 (m, 1H), 2.72 (m, 1H), 4.70 (m, 2H), 5.09 (m, 2H), 5.63 (m, 1H), 5.71 (m, 1H), 6.43 (m, 1H), 6.61 (m, 1H), 6.98 (d, 2H), 7.28 (m, 7H), 7.61 (d, 1H).

Provenance & Evidence