Benzyl-Type Cation Initiated Nucleophilic Substitution on Furan and Thiophene by Using α-EWG Ketene S,S-Acetals as Nucleophiles

Abstract

An efficient method for introducing nucleophiles on furan and thiophene has been established via the in situ formation of benzyl-type carbocation, delocalization of the carbocation on heterocyclic ring, and nucleophilic trap of α-EWG ketene S,S-acetal sequence at the 5-position.

Key words

alcohols - carbocation - catalysis - nucleophiles - titanium

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