organic compounds in medicinal chemistry, development of an efficient method for catalytic enantioselectivefluorination is increasingly desirable. Using a novel palladium complex 2 (1-2.5 mol %), various beta-ketoesters including cyclic and acyclic substrates were fluorinated with excellent enantioselectivity in the range of 83-94% ee. It is environmentally advantageous that this reaction proceeds
反映氟化有机化合物在药物化学中的重要性,越来越需要开发一种有效的催化对映选择性氟化方法。使用新型钯配合物 2 (1-2.5 mol%),包括环状和无环底物在内的各种 β-酮酯以 83-94% ee 的出色对映选择性氟化。该反应在诸如 EtOH 之类的溶剂中而不是通常的有机溶剂中进行得很好,这对环境是有利的。此外,该产品已成功转化为α-氟β-羟基和β-氨基酸衍生物,这对开发新药非常有用。
Highly enantioselective fluorination reactions of β-ketoesters and β-ketophosphonates catalyzed by chiral palladium complexes
Using chiral palladium enolates as key intermediates, efficient catalytic enantioselective fluorination reactions of active methine compounds have been developed. These reactions can be conducted in alcoholic solvents without any precaution to exclude water and moisture, and various β-ketoesters and β-ketophosphonates were fluorinated in a highlyenantioselective manner (up to 98% ee).