Triethylamine → 2-(4-(4-((4-Nitro-2-thiophenyl)sulfonyl)-1-piperazinyl)phenyl)-1,1,1,3,3,3-hexafluoro-2-propanol

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Reaction Conditions

Reaction Steps

The 1,1,1,3,3,3-hexafluoro-2-(4-(1-piperazinyl)phenyl)-2-propanol hydrochloride (306 mg, 0.84 mmol, Example 91, Step 1) was dissolved in CH2Cl2 (20 mL) and the solution was chilled to 0° C. To this solution was added triethylamine (292 μL, 2.10 mmol) followed by 4-nitrothiophene-2-sulfonyl chloride (210 mg, 0.923 mmol). The mixture was allowed to warm to room temperature and stirred for 2 h. Afterwards, the mixture was filtered and concentrated, the filtrate was purified via reverse-phase preparative HPLC using a Phenomenex Gemini C18 column (150×30 mm, 10 μm) eluting with 0.1% TFA in CH3CN/H2O (5% to 100% over 15 min) to give 2-(4-(4-((4-nitro-2-thiophenyl)sulfonyl)-1-piperazinyl)phenyl)-1,1,1,3,3,3-hexafluoro-2-propanol (86 mg).

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