Potassium Phosphate, Tribasic → N-isobutyl-N-(3-methyl-5-(prop-1-en-2-yl)pyridin-2-yl)-4-((tetrahydro-2H-pyran yl)methoxy)benzenesulfonamide

関与物質

反応条件

反応手順

N-(5-chloro-3-methylpyridin-2-yl)-N-isobutyl-4-((tetrahydro-2H-pyran-4-yl)methoxy)benzenesulfonamide (140 mg, 0.31 mmol), potassium trifluoro(prop-1-en-2-yl)borate (69 mg, 464 μmol) and Buchwald's Suzuki-Miyaura cross-coupling pre-catalyst (prepared according to ref. J. Am. Chem. Soc. 2010, 132, 14073) (5 mg, 6.18 μmol) were dissolved in anhydrous THF (1 mL). To this solution was added degassed potassium phosphate (0.5 M aqueous) (2 mL, 1.0 mmol) then the reaction vessel sealed and heated by microwaves to 110° C. for 30 minutes. The reaction was cooled, combined with a previous identical trial reaction on a smaller (0.06 mmol) scale and concentrated in vacuo. The crude product was then extracted to the organic phase of an aqueous work up between ethyl acetate and water. The organic phase was passed through a hydrophobic frit, concentrated in vacuo, then purified by mass directed autoprep (formic acid modifier) to give the title compound 85% purity (87 mg). LCMS (2 min, formic) Rt 1.44 min, m/z (ES+) 459 (M+H).

情報源と証拠