Design and Synthesis of Novel C2-symmetric bis-cinchona Alkaloid Derivatives

Letters in Organic Chemistry
2016.0

Abstract

Background: The commercially available dimeric cinchona alkaloids based on C-9 ether bond connecting are limited by the absence of Bronsted acid moiety and cannot meet the enantioselectivity demand.Objective: In this study, a family of novel C2-symmetric bis-cinchona alkaloid derivatives possessing a range of mono- and bidentate hydrogen bond donor groups at the C-9 is now reported.Method: These novel C2-symmetric bis-cinchona alkaloid derivatives were synthesized by a facile route.Results: These novel C2-symmetric bis-cinchona alkaloid derivatives exhibit a rare example of Bronsted acid moiety of C-9, basic tertiary amine moiety, and a rigid enzyme-like pocket, suggesting their potential, broadly useful bifunctional organic catalysts for asymmetric synthesis.

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