Sodium Carbonate → 4-{4-[2-(3-Chlorophenylamino)-oxazol-5-yl]-phenyl}-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester

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Reaction Conditions

Reaction Steps

Preparation of -(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester has been described [Tet. Lett. 41-(19), 3705-3708, 2000]. The boronate ester (1.1 g, 3.6 mmol, 1.5 equiv) and [5-(4-bromo-phenyl)-oxazol-2-yl]-(3-chloro-phenyl)-amine (0.84 g, 2.4 mmol, 1.0 equiv) were dissolved in 12 mL DME and then charged with 3 mL of a 2M Na2CO3 solution. Pd(Ph3)4 on polystyrene resin (0.72 g, 0.072 mmol) was added, and the suspension was sparged with nitrogen for 10 min, then heated to 100° C. overnight. The reaction was then filtered to remove catalyst, and following solvent removal the product was triturated with hexanes and ether to afford the title compound: (M+H)+452.1.

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