The synthesis of 3,3-dimethyl-2-(1-aryl-1<i>h</i>-pyrazol-4-yl)-3<i>h</i>-indoles
作者:Mehdi M. Baradarani、Arash Afghan、Farideh Zebarjadi、Kamal Hasanzadeh、John A. Joule
DOI:10.1002/jhet.5570430624
日期:2006.11
mono-hydrazones as mixtures of cis and trans isomers. Heating the hydrazones in refluxing ethanol produced 3,3-dimethyl-2-(1-aryl-1H-pyrazol-4-yl)-3H-indoles in excellent yields. Reaction of the β-diformyl compounds with hydrazine itself led directly to 3,3-dimethyl-2-(pyrazol-4-yl)-3H-indoles.
在50℃下,通过Vilsmeier试剂的作用,将2,3,3-三甲基吲哚啉和5-氯-2,3,3-三甲基吲哚啉转化为β-二甲酰基化合物。二醛与各种芳基肼和2-吡啶基肼反应生成顺式和反式异构体混合物的单hydr 。加热该腙在回流的乙醇生产的3,3-二甲基-2-(1-芳基- 1 H ^ -吡唑-4-基)-3- ħ -indoles以优良产率。β-二甲酰基化合物与肼本身的反应直接导致3,3-二甲基-2-(吡唑-4-基)-3 H-吲哚。