Multisubstituted alkenes are ubiquitous motifs in pharmaceuticals, natural products, (1) and functional materials and also serve as versatile synthetic building blocks. (2,3) Although classical alkene syntheses, including carbonyl olefination (4) and olefin metathesis, (5) have been reliably used to access disubstituted alkenes, the stereoselective synthesis of tri- and tetrasubstituted alkenes remains challenging.