palladium-catalyzed alkoxycarbonylation of an α-chloro ketone can be efficiently combined to a Michaeladditionreaction in a new two-step dominoreaction, allowing the synthesis of original highly functionalized α-alkylated β-ketoesters. The scope of the reaction was extended to several α-chloro ketones and Michael acceptors with moderate to very good yields.
By utilising a chiral bicyclic guanidine as catalyst and triethylamine as additive, the first asymmetric Michael addition of α-fluoro-β-ketoesters to various cyclicenones has been successfully developed, affording a variety of Michael adducts with potential synthetic utilities with satisfactory stereoselectivity (up to 94 % ee and 4.3 : 1 dr).