A mixed lithiumâcadmium amide and a combination of lithium and zinc amides were reacted with a range of ferrocenes; deprotonative mono- or dimetallation in general occurred chemoselectively at room temperature, as evidenced by subsequent quenching with iodine.
Planar Chiral Pseudo‐Isocoumarins by Copper Catalysed Desymmetrisation
作者:Adam J. Wright、Fiona J. McMartin、Liam G. Dyer、Lloyd H. Sayer、Philip C. Bulman Page、G. Richard Stephenson
DOI:10.1002/ejic.202100841
日期:2022.4.27
ferrocenecarboxylic acids results in the first asymmetric synthesis of planar chiral pseudo-isocoumarins in up to 64 % enantiomeric excess and up to 99 % yield. The absoluteconfiguration of the chiral heterocycles is proven by chemical correlation and circulardichroism spectroscopy, opening the way for the rational extension of this method to produce bioactive isocoumarin-fused ferrocene derivatives.