Bioinspired total synthesis of (−)-gymnothelignan L

The first asymmetric total synthesis of gymnothelignan L has been accomplished in 14 steps with 11.2% overall yield. The synthetic approach features an anti Evans aldol reaction, a diastereoselective methylation, a Suzuki–Miyaura coupling and a bioinspired desymmetric transannular Friedel–Crafts reaction.

Asymmetric synthesis of ent-fragransin C1

The first asymmetric synthesis of ent-fragransin C₁ bearing 2,3-anti-3,4-syn-4,5-anti stereochemistries is reported.