Cesium carbonate → HCID 57795035, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of enantiomer A of 2-bromo-6-[1-(6-methoxypyridin-2-yl)-2,2-dipyridin-3-ylethyl]pyridine (1.00 g, 2.235 g), methanesulfonamide (0.255 g, 2.683 mmol), Cs2CO3 (1.02 g, 3.13 mmol), Pd2(dba)3 (41 mg, 0.045 mmol), and xantphos (78 mg, 0.134 mmol) in anhydrous dioxane (10 mL) under N2 was degassed (3× pump/N2) and heated to 100° C. for 16 hr. The mixture was cooled to rt and diluted with CHCl3. The mixture was filtered through a pad of celite and washed with CHCl3 and EtOAc. The filterate was concentrated and purified by silica gel chromatography (1-5% MeOH in CH2Cl2). The mixture was then purified by acidic reverse phase HPLC (95% H20:5% CH3CN to 100% CH3CN +0.1% TFA). The fractions were concentrated then quenched with saturated aqueous. sodium bicarbonate, and extracted 3× with EtOAc. The combined organic were dried (anhd. Na2SO4), filtered and concentrated to give N-{6-[1-(6-methoxypyridin-2-yl)-2,2-dipyridin-3-ylethyl]pyridin-2-yl}methanesulfonamide. 1H NMR (500 MHz, d6 DMSO) δ 10.43 (s, 1H), 8.64 (d, 2H, J=8.3), 8.22 (t, 2H, J =5.2), 7.91 (td, 2H, J=6.2, 1.8, 7.55-7.40 (m, 2H), 7.25-7.10 (m, 3H) 7.06 (d, 1H, J=7.3), 6.55 (d, 1H, J=7.6), 6.44 (d, 1H, J=8.1), 5.43 (d, 1H, J=12.2), 5.39 (d, 1H, J=12.2), 3.82 (s, 3H), 3.45 (s, 3H), LRMS m/z (M+H) Calcd: 462.1595, found 462.1597. Enantiomer B of N-{6-[1-(6-methoxypyridin-2-yl)-2,2-dipyridin-3-ylethyl]pyridin-2-yl}methanesulfonamide (LRMS m/z (M+H) Calcd.: 462.1595, found 462.1597) was synthesized using the method described above except with enantiomer B of 2-bromo-6-[1-(6-methoxypyridin-2-yl)-2,2-dipyridin-3-ylethyl]pyridine.

Provenance & Evidence