Diisopropylethylamine → HCID 86670404, compound

Participants

Reaction Conditions

Reaction Steps

A 20-mL vial was charged with tert-butyl (3R)-3-(((2-methylpropyl)(methylsulfonyl)amino)methyl)-1-piperazinecarboxylate (0.498 g, 1.42 mmol, step 1), 2-(2-chloropyrimidin-5-yl)-1,1,1,3,3,3-hexafluoropropan-2-ol (0.479 g, 1.71 mmol, Intermediate D), DIPEA (0.75 mL, 4.3 mmol) and 1,4-dioxane (5 mL). The mixture was heated at 100° C. for 12 h and then cooled to room temperature and partitioned between water (50 mL) and EtOAc (40 mL). The aqueous phase was extracted with EtOAc (40 mL) and the combined organic extracts were washed with saturated aqueous NaCl (60 mL) dried over sodium sulfate, filtered and concentrated in vacuo. The crude product was purified by column chromatography (50 g of silica gel, 0 to 50% EtOAc in hexanes) to afford tert-butyl (3R)-3-(((2-methylpropyl)(methylsulfonyl)amino)methyl)-4-(5-(2,2,2-trifluoro-1-hydroxy-1-(trifluoromethyl)ethyl)-2-pyrimidinyl)-1-piperazinecarboxylate (0.655 g) as a light-yellow foam.

Provenance & Evidence