Cesium carbonate → 4-[[[2-[[(2,3-Difluorophenyl)methyl]thio]-6-ethoxy-4-pyrimidinyl]amino]sulfonyl]-1-piperazinecarboxylic acid-1,1-dimethylethyl ester

Participants

Reaction Steps

The subtitle compound was prepared according to the procedure outlined in example 1 step (iv) using a mixture of 4-(aminosulfonyl)-1-piperazinecarboxylic acid-1,1-dimethylethyl ester (the product from step i) (0.29 g), tris(dibenzylideneacetone)dipalladium (0) (67 mg), 2-dicyclohexylphosphiiao-2′,4′,6′-tri-isopropyl-1,1′-biphenyl (XPHOS) (35 mg), cesium carbonate (0.36 g) and 4-chloro-2-[[(2,3-difluorophenyl)methyl]thio]-6-ethoxy-pyrimidine (the product from example 14, step i) (0.23 g) in dioxane (5 mL). Purification was by column chromatography on silica using EtOAc/isohexane (1:9 to 1:3 gradient) as eluent to give the subtitle compound as a yellow oil. Yield: 0.25 g

Provenance & Evidence