Table 2.
Ir-catalyzed allylations of acyclic α-alkoxy ketone enolates: scope of allylic carbonates.[a]
The molar ratio of 1a/2/3/LHMDS/CuBr = 2/1/0.02/2/2. The absolute configurations were assigned by analogy. The structure of 4ag was determined by X-ray analysis. The yields were reported as the combined yields of two diastereoisomers. The diastereomeric ratios were determined by 1H NMR analysis of crude reaction mixtures. The enantiomeric excesses were determined by chiral SFC analysis of major isomers.
0.5 equiv. of CuBr was used.