反应详情

温度

50 °C

A mixture of ethyl 7-hydroxy-5-[4-(methylsulfonyl)phenoxy]-1H-indole-2-carboxylate (2.3 g), 1-{[di-tert-butyl(phenyl)silyl]oxy}propan-2-ol (3.9 g), 1,1′-(azodicarbonyl)dipiperidine (3.1 g), tributylphosphine (3.1 mL) and tetrahydrofuran (20 mL) was stirred at 50° C. for 18 hr. The reaction solution was allowed to cool to room temperature, and the precipitated white solid was filtered off. The filtrate was concentrated, and the residue was subjected to silica gel column chromatography (ethyl acetate:hexane=0:100 to 30:70, volume ratio) to give the title compound (2.4 g, yield 57%) as an orange oil. MS 672 (MH+).

1. temperatureto cool to room temperature
2. filtrationthe precipitated white solid was filtered off
3. concentrationThe filtrate was concentrated