Sodium Carbonate → (1S,4R)-4-hydroxy-2,2-dimethyl-4-{5-[3-methyl-5-(4-methyl-pyrimidin-2-ylamino)-phenyl]-1,3-thiazol-2-yl}-cyclohexanecarboxylic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a mixture of (4-methyl-pyrimidin-2-yl)-[3-methyl-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-amine (20.0 g, 56.9 mmol), (1S,4R)-4-(5-Bromo-thiazol-2-yl)-4-hydroxy-2,2-dimethyl-cyclohexanecarboxylic acid methyl ester (19.8 g, 56.9 mmol), and PdCl2(dppf)2 (2.33 g, 2.85 mmol) in degassed 2-methyltetrahydrofuran (237 mL), was added sodium carbonate (2 M in H2O, 56.9 mL, 114 mmol). The reaction flask was purged with nitrogen and then heated to 70° C. for 5 hours. The mixture was cooled to room temperature, diluted with ethyl acetate (100 mL) and filtered over celite. The solution was washed with water, dried over MgSO4, filtered and concentrated in vacuo. Purification by chromatography on silica gel (Isco CombiFlash 100:0 to 40:60, hexanes:ethyl acetate), then by Chromatography on silica gel (2:98, methanol:dichloromethane) provided 17.5 g (37.4 mmol 66%) of (1S,4R)-4-hydroxy-2,2-dimethyl-4-{5-[3-methyl-5-(4-methyl-pyrimidin-2-ylamino)-phenyl]-1,3-thiazol-2-yl}-cyclohexanecarboxylic acid methyl ester as a light tan foam.

Provenance & Evidence