Diisopropylamine → 1,1,1-Trifluoro-2-(3-((3-methyl-3-oxetanyl)ethynyl)-4-(4-(2-thiophenylsulfonyl)-1-piperazinyl)phenyl)-2-propanol

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A 20 mL vial was charged with 2-(3-bromo-4-(4-(thiophen-2-ylsulfonyl)piperazin-1-yl)phenyl)-1,1,1-trifluoro-2-propanol (0.500 g, 1.00 mmol), diisopropylamine (2.14 mL, 15.0 mmol), 2 mL of DMF, tetrakis(triphenylphosphine)palladium (0) (0.116 g, 0.100 mmol, Strem Chemical Inc, Newburyport, Mass.), copper (I) iodide (0.019 g, 0.100 mmol, Strem Chemical Inc, Newburyport, Mass.), and trimethyl((3-methyloxetan-3-yl)ethynyl)silane (0.506 g, 3.00 mmol, published PCT patent application no. WO2010030954). The vial was sealed and heated at 100° C. for 3 h. After that time, an additional 20 mol % of both tetrakis(triphenylphosphine)palladium (0) and copper (I) iodide were added and heating was continued for an additional 12 h. The mixture was concentrated and purified by column chromatography (40 g of silica, 0 to 60% EtOAc in hexanes) to give 1,1,1-trifluoro-2-(3-((3-methyl-3-oxetanyl)ethynyl)-4-(4-(2-thiophenylsulfonyl)-1-piperazinyl)phenyl)-2-propanol (0.150 g) as a mixture of two enantiomers.

Herkunft & Nachweise