Tetrahydrofuran → 3-(2-Benzyloxy-3-cyanophenyl)-8-aza-bicyclo[3.2.1]oct-2-ene-8-carboxylic acid tert-butyl ester

Participants

Reaction Steps

To a flask was added 2-benzyloxy-3-bromobenzonitrile (1.29 g, 4.47 mmol), 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-8-azabicyclo[3.2.1]oct-2-ene-8-carboxylic acid tert-butyl ester (1.50 g, 4.47 mmol), and THF (30 mL), 2.0 M sodium carbonate in water (8.95 mL), and bis(triphenylphosphine)palladium(II) chloride (78 mg, 0.11 mmol). The reaction mixture was purged with nitrogen, heated to reflux overnight, cooled to room temperature, and concentrated. The resulting solution was diluted with DCM (25 mL) and washed with water (25 mL) The organic layer was collected, dried over anhydrous sodium sulfate, filtered, and concentrated. The crude product was purified by flash column chromatography eluting with ethyl acetate in hexanes (0-50%) to give partially purified product (1.2 g). (m/z): [M+H]+ calcd for C26H28N2O3 416.21; (-tert-butyl 361.2); found 361; (-Boc 317.2); found 317.

Provenance & Evidence