Investigations Concerning the Syntheses of TADDOL-Derived Secondary Amines and Their Use To Access Novel Chiral Organocatalysts
作者:Mario Waser、Katharina Gratzer
DOI:10.1055/s-0032-1316804
日期:——
of the catalysts prepared was found to be highly useful for the phase-transfer catalyzed α-alkylation of glycineSchiffbase (high yields and up to 93% ee). A structurally carefully diversified library of novel TADDOL-derived chiral secondary amines was synthesized and investigated for their applicability to obtain new organocatalysts like chiral Lewis bases and chiralphase-transfercatalysts. The scope
A novel class of tartaric acid-derived N-spiro quaternary ammonium salts was synthesised starting from known TADDOLs. These compounds were found to catalyse the asymmetric α-alkylation of glycine Schiff bases with high enantioselectivities and in good yields.