The regiospecific Fischer indole reaction in choline chloride·2ZnCl<sub>2</sub>with product isolation by direct sublimation from the ionic liquid

Raul Calderon Morales, Vasuki Tambyrajah, Paul R. Jenkins, David L. Davies, Andrew P. Abbott

Chemical Communications · 2004 · 127 citations · 12 references

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Abstract

The Fischer indole synthesis occurs in high yield with one equivalent of the ionic liquid choline chloride[middle dot]2ZnCl(2); exclusive formation of 2,3-disubstituted indoles is observed in the reaction of alkyl methyl ketones, and the products readily sublime directly from the ionic liquid.

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