interesting and important to perform a nitrogen or oxygen selective reaction with interesting substrates. These atom specific reactions are crucial to specifically synthesis of specific compounds. An enantioselective N‐specific reaction of nitrosobenzene with unmodified aldehydes was successfully achieved catalyzed first by a variety of primaryamine‐based organocatalysts with higher yield and enantioselectivity
p‐nitrobenzoic acid, the O‐nitroso aldol reaction of nitrosobenzene with enolisable aldehydes may be promoted by commercially available α,α‐diphenylprolinol trimethylsilylether. The reaction proceeds with good yields and essentially complete enantioselectivity, with catalyst loadings in the 5–10 mol % range. The resulting α‐oxyaldehyde adducts may be transformed in situ into α‐oxyimines, which provide 1,2‐amino
Synthesis of biphenyl-based chiral amine catalysts from dibromopyrenes and their application in enamine catalysis
作者:Yuki Uwaso、Naoki Yokoyama、Taichi Kano
DOI:10.1039/d3ob01059g
日期:——
Novel axially chiral biphenyl-based amine catalysts have been designed and synthesized from dibromopyrenes. These chiral amines function as effective catalysts for asymmetric reactions through enamine intermediates.