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Synthesis of Quaternary -Amino Esters: A Remarkably Broad Substrate Scope in Aza-Friedel−Crafts Alkylation

submitted on 10.04.2020, 15:50 and posted on 13.04.2020, 07:38 by Stephane Roche, Guangkuan zhao, Shyam Samanta, Jessica Michieletto
A versatile synthetic protocol of aza-Friedel−Crafts alkylation has been developed for the synthesis of quaternary a-amino esters. This operationally simple alkylation proceeds under ambient conditions with high efficiency, regioselectivity, and an exceptionally broad scope of arene nucleophiles. A key feature of this alkylation is the role associated with the silver(I) salt counteranions liberated during the reaction. Taking advantage of a phase-transfer counteranion/BrØnsted acid pair mechanism, a catalytic enantioselective version of the reaction is also reported.


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Florida Atlantic University



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Declaration of Conflict of Interest

The authors declare no conflict of interest.