反应详情

温度

0 °C

The 1-(5-butylthiophen-2-yl)-ethanone oxime obtained in step 2 is dissolved in tetrahydrofuran under an inert gas atmosphere and doubly deprotonated with 2 equivalents of n-butyllithium at 0° C. The solution is admixed with a solution of 0.5 equivalents of methyl 4-octylbenzoate in tetrahydrofuran, and the mixture is stirred for 30 min at 0° C., then admixed with 3 M HCl and refluxed for 1 h. Customary work-up followed by purification by column chromatography over silica gel 60 (eluent: dichloromethane/heptane 1:1) and recrystallizsation affords 3-(5-butylthiophen-2-yl)-5-(4-octylphenyl)-isoxazole; X 63 SC 82 SA 88 N 89 I.

1. temperaturerefluxed for 1 h
2. customCustomary work-up followed by purification by column chromatography over silica gel 60 (eluent: dichloromethane/heptane 1:1) and recrystallizsation