Ethyl Acetate → 6-[5-(3-Methanesulfonyl-propoxymethyl)-pyridin-3-yl]-3,4-dihydro-2H-[1,8]naphthyridine-1-carboxylic acid amide

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Reaction Steps

3-Bromo-5-(3-methanesulfonyl-propoxymethyl)-pyridine (61 mg, 0.20 mmol) and 2.0 M Na2CO3 aqueous solution (0.20 mL, 0.40 mmol) are added into the crude 6-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-3,4-dihydro-2H-[1,8]naphthyridine-1-carboxylic acid amide 1,4-dioxane solution (2.0 mL, 0.24 mmol) which is synthesized according to the procedure for Step 3 of Example 16. Argon gas is bubbled through the solution for 5 min. Then PdCl2dppf (7.3 mg, 0.010 mmol) is added. The mixture is heated at 100° C. for 3.5 hrs before EtOAc (15 mL) and water (15 mL) are added. The aqueous layer is separated and extracted with EtOAc (2×10 mL). The organic layers are combined and concentrated to give the crude product. Purification by flash column chromatography affords 42 mg of the titled product.

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