Scheme 2. Optimization of Reaction Conditions.
Reactions performed on a 0.1 mmol scale with NiCl2·DME (18 mol %), L1 (18 mol %), and Zn nanopowder (4 equiv).
NMR yield using CH2Br2 as an internal standard.
Isolated yield.
Reaction was performed on 2 mmol scale with 5 mol % catalyst loading; d.r. 4.3:1.
Accessed by esterification of compound 7 (from Scheme 4B); for more information, see the Supporting Information.