Regio- and Enantioconvergent Hydroallylation of Acrylates Enabled by γ-Silyl-Substituted Allyl Acetates.

Transition-metal-catalyzed asymmetric allylic substitution provides an efficient route to chiral organic molecules featuring an allyl moiety, key intermediates in the synthesis of biologically active compounds. However, the use of unsymmetrical 1,3-disubstituted allyl electrophiles has been severely constrained by the challenges of achieving both regio- and stereoselectivity simultaneously. Herein, we present γ-silyl-substituted allyl acetates as highly effective electrophiles for a regio- and enantioconvergent hydroallylation, enabling the construction of vicinal stereogenic centers. This method delivers allylated products in 44-93% yield with 79:21 to >95:5 dr and 88 to >99% ee. Additionally, the silyl group in the products can be readily converted into other functional groups, such as acyl and aryl groups, enhancing their synthetic utility.