反应详情

温度

30 °C

Diethyl azodicarboxylate (3.96 g, 22.72 mmol, 3.0 eq) is added at room temperature to a stirred solution of [trans-4-(2-hydroxy-ethyl)-cyclohexyl]-carbamic acid tert-butyl ester (1.84 g, 7.57 mmol, 1.0 eq), 6-methoxy-[1,5]naphthyridin-3-ol (1.80 g, 10.22 mmol, 1.35 eq) and triphenylphosphine (5.96 g, 22.72 mmol, 3.0 eq) in tetrahydrofuran (70 mL). After 14 hours stirring at 30° C., tetrahydrofuran is evaporated and the resulting crude product is purified by column chromatography (silica gel, eluent: petroleum ether:ethyl acetate, 6:1, v/v) to afford {trans-4-[2-(6-methoxy-[1,5]naphthyridin-3-yloxy)-ethyl]-cyclohexyl}-carbamic acid tert-butyl ester as an off-white solid (1.65 g, 53.5% yield).

1. customtetrahydrofuran is evaporated
2. customthe resulting crude product is purified by column chromatography (silica gel, eluent