Earth‐Abundant Metal Catalysis for Alkyl Heck‐Type Reactions With Unbiased Electrophiles

The Mizoroki–Heck reaction is a powerful method for constructing C(sp 2 )–C(sp 2 ) bonds through the coupling of (pseudo)halide electrophiles with alkenes. In contrast, the alkyl Heck variant, particularly reactions involving unbiased alkyl electrophiles, remains comparatively underdeveloped. Most existing methods rely on palladium catalysts, although recent years have seen growing progress with earth‐abundant‐metals such as nickel (Ni), cobalt (Co), iron (Fe), and copper (Cu). This short review summarizes recent advances in alkyl Heck‐type reactions that couple unbiased alkyl electrophiles with either activated (Type III) or unactivated alkenes (Type IV) under catalysis by earth‐abundant‐metals. The review is organized according to the metal catalyst employed and also includes recent developments in alkyl Heck‐type reactions catalyzed by a main‐group metal, bismuth.