反应详情

温度

90 °C

30% aqueous hydrogen peroxide (1.7 g, 0.015 mole) is added to a stirred solution of 2,6-bis(1,1-dimethylethyl)-4-[5-(methylthio)-1,3,4-thiadiazol-2-yl]-phenol (5.0 g, 0.015 mole) in glacial acetic acid (20 ml). The resulting mixture is heated to 90° C. for three hours. The mixture is cooled and concentrated in vacuo. The residue is purified by flash chromatography (SiO2, 25% ethyl acetate/hexane eluent) to provide a solid which is recrystallized from ethyl acetate/hexane to give 1.4 g of 2,6-bis(1,1-dimethylethyl)-4-[5-(methylsulfinyl)-1,3,4-thiadiazol-2-yl]-phenol (5.3 g theor., 26%), mp 141.2° C.

1. temperatureThe mixture is cooled
2. concentrationconcentrated in vacuo
3. customThe residue is purified by flash chromatography (SiO2, 25% ethyl acetate/hexane eluent)
4. customto provide a solid which
5. customis recrystallized from ethyl acetate/hexane