Water → 8-[3-(Methyloxy)-4-nitrophenyl]-1,4-dioxaspiro[4.5]dec-7-ene

関与物質

反応条件

反応手順

To a stirred solution of 8-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,4-dioxaspiro[4.5]dec-7-ene (1.09 g, 4.13 mmol) in dioxane (17 mL) was added 5-chloro-2-nitroanisole (0.64 g, 3.44 mmol), dichlorobis(triphenylphosphine)palladium(II) (0.12 g, 0.17 mmol) and 1.0 M Na2CO3 in H2O (10.32 mL, 10.32 mmol). The mixture was degassed by purging the reaction flask with vacuum/then N2 back-fill (5×). Under N2 the reaction was then heated to 80° C. and stirred overnight (approximately 16 h). The reaction was cooled to rt and diluted with EtOAc, then filtered through Celite, washing with EtOAc. The filtrate was concentrated under vacuum. The residue was taken up in EtOAc and H2O. The H2O layer was separated and extracted with EtOAc. The combined organic layers were washed with brine, dried over MgSO4, filtered, then concentrated and purified by silica gel chromatography to give the title compound of step C (911 mg, 3.13 mmol, 91%) as an amber oil. MS (ESI): 292 [M+H]+.

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