反应详情

温度

40 °C

A mixture of 4-[5-(5-ethyl-thiophen-2-yl)-[1,2,4]oxadiazol-3-yl]-2,6-dimethyl-phenol (367 mg, 1.22 mmol) and epichlorohydrine (565 mg, 6.10 mmol) in isopropanol (20 mL) and 3 N aq. NaOH (6 mL) is stirred at 40° C. for 15 h. The mixture is diluted with diethyl ether, washed with sat. aq. NaHCO3 and water, dried over MgSO4, filtered and evaporated. The crude product is purified by CC on silica gel eluting with heptane:EA 9:1 to give 3-(3,5-dimethyl-4-oxiranylmethoxy-phenyl)-5-(5-ethyl-thiophen-2-yl)-[1,2,4]oxadiazole (123 mg) as a pale yellow oil; LC-MS: tR=1.15 min, [M+1]+=357.11.

1. washwashed with sat. aq. NaHCO3 and water
2. dry with materialdried over MgSO4
3. filtrationfiltered
4. customevaporated
5. customThe crude product is purified by CC on silica gel eluting with heptane:EA 9:1