A flexible strategy for the synthesis of bifunctional 6′-(thio)-urea containing Cinchona alkaloid ammonium salts

A flexible strategy for the synthesis of bifunctional 6′-(thio)-urea containing Cinchona alkaloid ammonium salts New Members of the Cinchona Alkaloids Family: Assembly of the Triazole Heterocycle at the 6′ Position Chiral Salts of Dithiophosphonic Acids on the Basis of Monoterpenyl Alcohols and Cinchona Alkaloids Design and Synthesis of Novel C2-symmetric bis-cinchona Alkaloid Derivatives Synthesis of an advanced precursor of Rivastigmine: Cinchona -derived quaternary ammonium salts as organocatalysts for stereoselective imine reductions Synthesis of 10,11-DidehydroCinchona Alkaloids and Key Derivatives A novel C-5′ substituted cinchona alkaloid-derived catalyst promotes additions of alkyl thiols to nitroolefins with excellent enantioselectivity A New Trimeric Cinchona Alkaloid as a Chiral Phase-Transfer Catalyst for the Synthesis of Asymmetric α-Amino Acids Novel Selenoureas Based on Cinchona Alkaloid Skeleton: Synthesis and Catalytic Investigations N‐Fluoro Ammonium Salts of Cinchona Alkaloids in Enantioselective Electrophilic Fluorination