Fig. 7: Comparison of precatalyst 1 to in situ systems for challenging asymmetric allylic alkylation reactions in the synthesis of chiral butenolide 19.

A Direct allylation of 18. B Decarboxylative allylation of 20. C Allylation of siloxyfuran 21.

A Direct allylation of 18. B Decarboxylative allylation of 20. C Allylation of siloxyfuran 21.