Cesium carbonate → 2-[[6-[(cyclopropylsulfonyl)amino]-2-[[(2,3-difluorophenyl)methyl]thio]-4-pyrimidinyl]oxy]-(2R)-propanoic acid ethyl ester

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Reaction Steps

The subtitle compound was prepared according to the procedure outlined in example 1, step iv) using a mixture of cyclopropanesulfonamide (prepared according to patent WO 2003/099274, 0.14 g), tris(dibenzylideneacetone)dipalladium (0) (71 mg), 2-dicyclohexylphosphino-2′,4′,6′-tri-isopropyl-1,1′-biphenyl (XPHOS) (52 mg), cesium carbonate (0.38 g), 2-[[6-chloro-2-[[(2,3-difluorophenyl)methyl]thio]-4-pyrimidinyl]oxy]-(2R)-propanoic acid ethyl ester (the product of Example 23 step i) (0.30 g) and dioxane (10 mL). Purification was by column chromatography on silica gel using EtOAc/isohexane (1:1) as eluent to give the subtitle compound as an oil. Yield: 0.30 g

Provenance & Evidence