An unexpected reaction of indole derivatives and EAA catalyzed with InCl3
Molecular Catalysis(2023)
Abstract
When indole derivatives reacted with ethyl acetoacetate (EAA) using Indium(III) chloride (InCl3) as a catalyst, cyclobutenes were obtained unexpectedly. The structure was identified by 2D-NMR and HRMS. Thus our data maybe established a new method to synthesize cyclobutenes, at least for the indole based cyclobutenes. A plausible mechanism for this surprising reaction was also proposed.
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Key words
Indole derivatives,Ethyl acetoacetate,Indium(III) chloride,Cyclobutenes
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