α-branched ketones 2 and perchloric acid react in boiling ethanol to give via the in situ formed hydrazones 3 1,2,3,3-tetrasubstituted 3H-indolium perchlorates 4. The scope and limitations of this facile synthesis of 3H-indolium derivatives which combines the hydrazone formation and the Fischer indolization to an one-pot procedure are discussed.
ñ -取代Ñ -phenylhydrazines 1,α-支链酮2和
高氯酸在沸腾的
乙醇,得到的反应通过在原位形成腙3 1,2,3,3-四取代的3 ħ -indolium
高氯酸盐4的范围和限制讨论了3 H-
吲哚鎓衍
生物的简便合成方法,该方法将the的形成和Fischer
吲哚化结合为一锅法。