Description General description Sulfoxonium ylides are highly stable carbene precursors, serving as a safer alternative to diazo compounds as they that do not generate gases as byproducts. Sulfoxonium ylides have been shown to be effective in a wide array of transition metal catalyzed C-H functionalization and coupling reactions. Other Notes For additional technical information see Ketosulfoxonium Ylides: Safe, Versatile Carbene Equivalents Coupling of Sulfoxonium Ylides with Arynes: A Direct Synthesis of Prochiral Aryl Ketosulfoxonium Ylides and Its Application in the Preparation of α-Aryl Ketones