Ultrasonic irradiation of α,β-unsaturated carbonyl compounds 1a–i with acetonitrile in the presence of potassium t-butoxide gave 3-cyano-2-methylpyridines 2a–i in moderate to good yields. The pyridines are produced by a Michael reaction of 3-iminobutanonitrile, an acetonitrile dimer, to the substrates 1a–i.
在存在
叔丁醇钾的条件下,使用超声辐射处理α,β-不饱和羰基化合物1a–i与
乙腈,获得3-
氰基-2-
甲基吡啶2a–i,产率中等到良好。这些
吡啶是通过
3-亚氨基丁腈(
乙腈的二聚体)与底物1a–i之间的迈克尔反应生成的。