Asymmetric synthesis of optically active fluorine-containing alcohols using chiral catalysts
作者:Kenso Soai、Yuji Hirose、Seiji Niwa
DOI:10.1016/s0022-1139(00)80198-0
日期:1992.10
Optically active fluorine-containing alcohols have been synthesized in high enantiomeric excess by the catalytic enantioselective addition of dialkylzincs to fluorine-containing aldehydes.
Pd(II)-catalyzed site-selective β- and γ-C(sp3)–Harylation of primary aldehydes is developed by rational design of L,X-type transient directing groups (TDG). External 2-pyridone ligands are identified to be crucial for the observed reactivity. By minimizing the loading of acid additives, the ligand effect is enhanced to achieve high reactivities of the challenging primary aldehyde substrates. Site